Typy-JS

A validation package for express js to validate incoming request payload. It internally utilizes the express-validator library for input validation in Express.js applications.

For more practical examples, please see tests suite, there is separate test suite for each validation API.

Table of Contents

• Installation
• API
  • Validation.required(validation_options)
    • Example
  • Validation.integer(validation_options)
    • Example
  • Validation.isArray(validation_options)
    • Example
  • Validation.custom(validation_options)
    • Example
  • Validation.in(validation_options)
    • Example
  • Validation.notIn(validation_options)
    • Example
  • Validation.rangeOrBetween(validation_options)
    • Example
  • Validation.isObject(validation_options)
    • Example
  • Validation.if(validation_options)
    • Example
  • Validation.arrayNotEmpty(validation_options)
    • Example
  • Validation.customSanitizer(validation_options)
    • Example
  • Validation.lowercase(validation_options)
    • Example
  • Validation.uppercase(validation_options)
    • Example
  • Validation.requiredIfNot(validation_options)
    • Example
  • Validation.isString(validation_options)
    • Example
  • Validation.trim(validation_options)
    • Example
  • Validation.replace(validation_options)
    • Example
  • Validation.isJwt(validation_options)
    • Example
  • Validation.isStrongPassword(validation_options)
    • Example
  • Validation.isEmail(validation_options)
    • Example
  • Validation.same(validation_options)
    • Example
  • Validation.requiredWith(validation_options)
    • Example
  • Validation.requiredWithAll(validation_options)
    • Example
  • Validation.after(validation_options)
    • Example
  • Validation.afterOrEqual(validation_options)
    • Example
  • Validation.isUUID(validation_options)
    • Example
  • Validation.isDate(validation_options)
    • Example
  • Validation.isValidMongoId(validation_options)
    • Example
  • Validation.unique(validation_options)
    • Example
  • Validation.requiredWithKeys(validation_options)
    • Example
  • Validation.exists(validation_options)
    • Example
• Other
• License

Installation

npm i typy-js

OR

npm install typy-js

API

Validation.required(validation_options)

A function that returns a validation middleware for checking if a field is required.

validation_options (Optional)

• customFunction (Optional): A custom validation function to be executed instead of the default validation.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional): Custom error message for the validation failure.

Example

const { Rule, Validation } = require("typy-js");

// Without any validation options
const postCreateRule = new Rule({
    name:[
        Validation.required()
    ],
    body:[
        Validation.required()
    ]
})

app.post("/post",
    postCreateRule.createValidation(),
    postCreateRule.showValidationErrors(),
    (req,res) => {
    res.json("Successfully Passed All Validation")
});


// With CheckIn and Message Param
const postCreateRule = new Rule({
    name:[
        Validation.required({
            checkIn:"query", // "params", "body",
            message:"The name field is required and must be passed",
        })
    ],
    body:[
        Validation.required({
            checkIn:"body", // Yes, you can have different location,
            message:"The name field is required and must be passed",
        })
    ]
})

// With CustomFunction
const postCreateRule = new Rule({
    name:[
        Validation.required({
            checkIn:"query",
            customFunction: ({value, requestObject, field, param}) => {
                return Boolean(value) 
                    ? Promise.resolve() 
                    : Promise.reject("With Custom Function");
            }
        })
    ],
    body:[
        Validation.required({
            checkIn:"query",
            customFunction: ({value, requestObject, field, param}) => {
                return Boolean(value) 
                    ? Promise.resolve() 
                    : Promise.reject("With Custom Function");
            }
        })
    ]
})

Validation.integer(validation_options)

A function that returns a validation middleware for checking if a field is an integer.

validation_options (Optional)

• customFunction (Optional): A custom validation function to be executed instead of the default validation.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional): Custom error message for the validation failure.
• params (Optional): Params.
  • strict (Optional) : Set to true if want strict type check.
  • allow_leading_zeros (Optional) : Set to true if want to allow zeros at the starting of number.

Example

const { Rule, Validation } = require("typy-js");

// Without any validation options
const getPostRule = new Rule({
    id:[
        Validation.integer()
    ]
})

app.get("/post",
    getPostRule.createValidation(),
    getPostRule.showValidationErrors(),
    (req,res) => {
    res.json("Successfully Passed All Validation")
});


// With CheckIn and Message Param
const getPostRule = new Rule({
    id:[
        Validation.integer({
            checkIn:"query",
            message:"The id field must be of type integer",
        })
    ]
})

// With CustomFunction
const getPostRule = new Rule({
    id:[
        Validation.integer({
            checkIn:"query",
            customFunction: ({value, requestObject, field, param}) => {
                return Boolean(value) 
                    ? Promise.resolve() 
                    : Promise.reject("With Custom Function");
            }
        })
    ]
})

Validation.isArray(validation_options)

A function that returns a validation middleware for checking if a field is an array.

validation_options (Optional)

• customFunction (Optional): A custom validation function to be executed instead of the default validation.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional): Custom error message for the validation failure.
• params (Optional)
  • min (Optional) : Minimum number of elements allowed in the array.
  • max (Optional): Maximum number of elements allowed in the array.

Example

const { Rule, Validation } = require("typy-js");

// Without any validation options
const getPostRule = new Rule({
    id:[
        Validation.integer()
    ]
})

app.get("/post",
    getPostRule.createValidation(),
    getPostRule.showValidationErrors(),
    (req,res) => {
    res.json("Successfully Passed All Validation")
});


// With CheckIn and Message Param
const getPostRule = new Rule({
    id:[
        Validation.integer({
            checkIn:"query",
            message:"The id field must be of type integer",
        })
    ]
})

// With CustomFunction
const getPostRule = new Rule({
    id:[
        Validation.integer({
            checkIn:"query",
            customFunction: ({value, requestObject, field, param}) => {
                return Boolean(value) 
                    ? Promise.resolve() 
                    : Promise.reject("With Custom Function");
            }
        })
    ]
})

Validation.custom(validation_options)

A function that returns a validation middleware defined by the user.

validation_options (Required)

• customFunction (Required): A custom validation function to be executed instead of the default validation.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Optional): Any extra values to be passed to the custom function

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  name:[
    Validation.custom({
      customFunction:({value, requestObject, field, param}) => {
        return value.length > 5 ? Promise.resolve() : Promise.reject(`${field} length must be greater than 5`);
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.in(validation_options)

A function that returns a validation middleware for whitelisting values.

validation_options (Required)

• message (Required): A custom message.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Required): Required params
  • values (Required) : Can be string or number or any value.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  roleName:[
    Validation.in({
      params:{
        values:['Admin','User']
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.notIn(validation_options)

A function that returns a validation middleware for blacklisting values.

validation_options (Required)

• message (Required): A custom message.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Required): Required params
  • values (Required) : Can be string or number or any value.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  roleName:[
    Validation.notIn({
      params:{
        values:['Customer']
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.rangeOrBetween(validation_options)

A function that returns a validation middleware for defining ranges.

validation_options (Required)

• message (Required): A custom message.
• customFunction (Optional): A custom function, which can be defined by user.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Required): Required params
  • min (Required) : Can be string or number.
  • max (Required) : Can be string or number.
  • type (Optional) : Can be string or number or date.

Example

const { Rule, Validation } = require("typy-js");

// With number
const createUserRule = new Rule({
  age:[
    Validation.rangeOrBetween({
      params:{
        min:10,
        max:20,
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

// With date
const checkBirthDateRangeRule = new Rule({
  birthDate:[
    Validation.rangeOrBetween({
      params:{
        min: '2023-01-01',
        max: '2023-12-31',
        type:"date"
      }
    })
  ]
});

// With another field's value
const checkBirthDateRangeRule = new Rule({
  birthDate:[
    Validation.rangeOrBetween({
      params:{
        min: 'allowedDates.min', // uses lodash_.get to get the field value.
        max: 'allowedDates.max', // uses lodash_.get to get the field value.
        type:"field"
      }
    })
  ],
  allowedDates:[
    Validation.required(),
    Validation.isObject(), // see validation.isobject.test.js for more detail
  ],
  "allowedDates.min":[        // Validating nested field
    Validation.required(),
  ],
  "allowedDates.max":[        // Validating nested field
    Validation.required(),
  ],
});

// -----------OR------------
const checkBirthDateRangeRule = new Rule({
  birthDate:[
    Validation.rangeOrBetween({
      params:{
        min: 'allowedDates[0]',
        max: 'allowedDates[1]', 
        type:"field"
      }
    })
  ],
  allowedDates:[
    Validation.required(),
    Validation.isArray({
      params:{
          min:2,
          max:2
      }
    }),
  ],
});

Validation.isObject(validation_options)

A function that returns a validation middleware for checking if the passed value is an Object.

validation_options (Required)

• message (Required): A custom message.
• customFunction (Optional): A custom function, which can be defined by user.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Optional): Params
  • strict (Optional) : Set to true if wanna strict type type

Example

const { Rule, Validation } = require("typy-js");

const createUser = new Rule({
  user_data:[
    Validation.isObject() // Since this uses express-validator under the hood for detail please vist `https://express-validator.github.io/docs/api/validation-chain/#isobject`
  ],
  "user_data.id":[
    Validation.required(),
    Validation.integer()
  ],
  "user_data.name":[
    Validation.required(),
    Validation.isString() // check validation.isstring.test.js
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.if(validation_options)

A function that returns a validation middleware based on condition defined for second Field, or it's value. This is a complex if validation, check validation.if.test.js for more clarity.

validation_options (Required)

• message (Optional): A custom message.
• customFunction (Optional): A custom function, which can be defined by user.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Required): Params
  • secondField (Required) : Name of another field.
  • secondFieldValue (Required) : The value of other field that should be same.
  • appliedOnFieldValue (Required) : The value of the current field ( the field this validation is applied to ).

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  roleName:[
    Validation.if({ 
      message:"The :attribute field's value must be same as allowName field's value",
      params:{
        secondField:"allowName",
        secondFieldValue:"Admin",
        appliedOnFieldValue:"Admin"
      }
    })
  ],
  allowName:[
    Validation.isString(),
    Validation.in({
      params:{
        values:["Admin"]
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

const createUserRule = new Rule({
  roleName:[
    Validation.if({ // Check's if secondField exists in the payload but the current value is absent.
      message:"The field :attribute must exists if allowName exists",
      params:{
        secondField:"allowName",
        secondFieldValue:"exists",
        appliedOnFieldValue:"exists"
      }
    })
  ],
  allowName:[
    Validation.isString(),
  ]
});

const createUserRule = new Rule({
  roleName:[
    Validation.if({
      message:"The :attribute should not exists if allowName is present in the payload",
      params:{
        secondField:"allowName",
        secondFieldValue:"exists",
        appliedOnFieldValue:"notexists"
      }
    })
  ],
  allowName:[
    Validation.isString(),
  ]
});

Validation.arrayNotEmpty(validation_options)

A function that returns a validation middleware that checks if the array is empty or not

validation_options (Optional)

• message (Optional): A custom message.
• customFunction (Optional): A custom function, which can be defined by user.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  skills:[
    Validation.arrayNotEmpty({
      message:"The array can not be empty"
    })
  ],
  "skills.*":[            // To validate every element in the array use "<field>.*"
    Validation.isString()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.customSanitizer(validation_options)

A function that returns a sanitizer middleware function defined by user.

validation_options (Required)

• customFunction (Required): A custom function, which can be defined by user.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  name:[
    Validation.customSanitizer({
      customFunction:(({ value, reqObject, field }) => {
        return value.toLowerCase();
      })
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.lowercase(validation_options)

A function that returns a sanitizer middleware to set string value as lowercase.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  name:[
    Validation.lowerCase()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.uppercase(validation_options)

A function that returns a sanitizer middleware to set string value as uppercase.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  name:[
    Validation.upperCase()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.requiredIfNot(validation_options)

A function that returns a validation middleware that makes a field required if the condition does not meet.

validation_options (Required)

• message (Optional): A custom message.
• customFunction (Optional): A custom function, which can be defined by user.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Required): Params
  • secondField (Required) : Name of another field.
  • secondFieldValue (Required) : The value of other field.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  username:[
    Validation.requiredIfNot({
      message:"The :attribute is required if email is not equal to [email protected]",
      params:{
        secondField:"email",
        secondFieldValue:"[email protected]"
      }
    }),
  ],
  email:[
    Validation.required(),
    Validation.isString()
  ]
});


app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.isString(validation_options)

A function that returns a validation middleware to check if the current field's value is type of string.

validation_options (Optional)

• message (Optional): A custom message.
• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Optional): Params
  • min (Optional) : Minimum number of characters.
  • max (Optional) : Maximum number of characters.

Example

const { Rule, Validation } = require("typy-js");

// Without any params
const createUserRule = new Rule({
  name:[
    Validation.isString({
      message:"The :attribute must be of type string"
    })
  ]
});


app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

// With min and max params
const createUserRule = new Rule({
  name:[
    Validation.isString({
      message:"The :attribute must be of type string and must have :min and :max string length",
      params:{
        min:5,
        max:10
      }
    })
  ]
});

Validation.trim(validation_options)

A function that returns a validation middleware that trims the string.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Required): Params
  • chars (Required) : Pattern to match. ( eg : " ", "@" )

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  name:[
    Validation.trim({
      params: {
        chars:" "
      }
    })
  ]
});


app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

const createUserRule = new Rule({
  name:[
    Validation.trim({
      params: {
        chars:"$$"
      }
    })
  ]
});

Validation.replace(validation_options)

A function that returns a validation middleware that replaces the string.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• params (Required): Params
  • new_value (Required) : A string value
  • value_to_replace (Required) : Can be a string or a regex pattern

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  name:[
    Validation.replace({
      params:{
        new_value:"Hello!",
        value_to_replace:"greetings"
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

const createUserRule = new Rule({
  name:[
    Validation.replace({
      params:{
        new_value:"Hello!",
        value_to_replace:/greeting/ig
      }
    })
  ]
});

Validation.isJwt(validation_options)

A function that returns a validation middleware that checks if the string is a valid JWT Token. It only matches the pattern, to verify the jwt token please use packages like bcrypt-js.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.

Example

const { Rule, Validation } = require("typy-js");

const createPostRule = new Rule({
  authorization:[
    Validation.isJwt({
      checkIn:"header",
      message:"The :attribute's value is not a valid jwt token"
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.isStrongPassword(validation_options)

A function that returns a validation middleware that checks if the string is a strong password.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Optional) : Params
  • pattern (Optional) : A Regex pattern to match.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  password:[
    Validation.isStrongPassword()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.isEmail(validation_options)

A function that returns a validation middleware that checks if the string is a valid email address.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Optional) : Params
  • pattern (Optional) : A Regex pattern to match.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  email:[
    Validation.isEmail()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.same(validation_options)

A function that returns a validation middleware that checks if the one field value is same as another field value.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • negate (Required) : Set to true is want to reverse the validation logic.
  • otherField (Required) : The other field to match with.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  password:[
    Validation.same({
      params:{
        otherField: "confirmPassword"
      }
    }),
    Validation.same({
      message:"The :attribute's value must not be same as temporaryPassword's value",
      params: {
        negate:true, // This reverse the validation check, password must not be same as temporary password
        otherField:"temporaryPassword"
      }
    })
  ],
  confirmPassword:[
    Validation.isString()
  ],
  temporaryPassword:[
    Validation.isString()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.requiredWith(validation_options)

A function that returns a validation middleware that checks the field that must be required with its peers.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • fields (Required) : Name of the fields to pair with.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  first_name:[
    Validation.requiredWith({
      params :{
        fields:["last_name","middle_name"]
      }
    })
  ],
  last_name:[
    Validation.isString()
  ],
  middle_name:[
    Validation.isString()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.requiredWithAll(validation_options)

A function that returns a validation middleware that checks the field that must be required with all of its peers.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • fields (Required) : Name of the fields to pair with.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  first_name:[
    Validation.requiredWithAll({
      params :{
        fields:["last_name","middle_name"]
      }
    })
  ],
  last_name:[
    Validation.isString()
  ],
  middle_name:[
    Validation.isString()
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.after(validation_options)

A function that returns a validation middleware that checks if the date is after an specified date.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • date (Required) : A valid date in string format, (eg : "2023-05-03" ). You can also pass another field name too.
    • See validation.after.test.js for more detail.

Example

const { Rule, Validation } = require("typy-js");

const createProductRule = new Rule({
  expire_date:[
    Validation.after({
      params : {
        date: "today"
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.afterOrEqual(validation_options)

A function that returns a validation middleware that checks if the date is after or equal to a specified date.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • date (Required) : A valid date in string format, (eg : "2023-05-03" ). You can also pass another field name too.
    • See validation.afterorequal.test.js for more detail.

Example

const { Rule, Validation } = require("typy-js");

const createProductRule = new Rule({
  expire_date:[
    Validation.afterOrEqual({
      params : {
        date: "today"
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.isUUID(validation_options)

A function that returns a validation middleware that checks if the date is after or equal to a specified date.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • version (Required) : A valid UUID version

Example

const { Rule, Validation } = require("typy-js");

const createUser = new Rule({
  user_id:[
    Validation.isUUID({
      params:{
        version:"all"
      }
    })
  ],
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.isDate(validation_options)

A function that returns a validation middleware that checks if provided value is a valid date.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Optional) : Params
  • format (Optional) : Date format, if not passed params then default is 'YYYY-MM-DD'.
  • delimiters (Optional) : It is an array of allowed date delimiters, if not passed params then defaults to ['/', '-'].
  • strictMode (Optional) : If strictMode is set to true, the validator will reject strings different from format.

Example

const { Rule, Validation } = require("typy-js");

const createUser = new Rule({
  dateOfBirth:[
    Validation.isDate({
      params : {
        format:"YYYY/MM/DD",
        delimiters:["-","/"]
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.isValidMongoId(validation_options)

A function that returns a validation middleware that checks if provided value is a valid mongo Id.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.

Example

const { Rule, Validation } = require("typy-js");

const createUser = new Rule({
  user_id:[
    Validation.isValidMongoId()
  ],
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.unique(validation_options)

A function that returns a validation middleware that checks if array has unique values.

validation_options (Optional)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.

Example

const { Rule, Validation } = require("typy-js");

const createUserRule = new Rule({
  hobbies:[
    Validation.unique()
  ],
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.requiredWithKeys(validation_options)

A function that returns a validation middleware that checks if array has required keys.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • keys (Required) : Array of string

Example

const { Rule, Validation } = require("typy-js");

// Use this with isArray({ bail:true }), use this as first validation element
// Set bail true, so that if the field is not an array it will not further validate
// Which can avoid unnecessary errors
const createUserRule = new Rule({
  designations:[
    Validation.isArray({
      bail:true
    }),
    Validation.requiredWithKeys({
      params :{
        keys: ["id","name"]
      }
    })
  ]
});

app.post("/post",
        createUserRule.createValidation(),
        createUserRule.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Validation.exists(validation_options)

A function that returns a validation middleware that checks if certain value exists in the database.

validation_options (Required)

• bail (Optional): If set to true, rest of the validation are skipped if the current one is failed.
• checkIn (Optional): Specifies the location to check the field (e.g., "body", "query", "params"). Default is 'any'
• message (Optional) : Any custom message on failure.
• params (Required) : Params
  • dbConnection (Required) : Mysql DB connection or PG client is supported.
  • dialect (Required) : Available values are 'mysql','pg'
  • negate (Optional) : Set to true if you want to negate the condition.
  • tableName (Required): Name of the table to check in.
  • columnToCheckAgainst (Required) : Name of the column to check against the value.

Example

const { Rule, Validation } = require("typy-js");

const { Client } = require("pg");

const pgClient = new Client({
  host:"localhost",
  port:5432,
  user:"postgres",
  password:"123456789",
  database:"postgres"
})

await pgClient.connect();

const createPost = new Rule({
  id:[
    Validation.exists({
      params:{
        dbConnection:pgClient,
        dialect:"pg",
        tableName:"users", // Table Name
        columnToCheckAgainst:"id" // Column in the table
      }
    }),
  ]
});

app.post("/post",
        createPost.createValidation(),
        createPost.showValidationErrors(), 
        (req,res) => {
    res.json("Successfully Passed All Validation")
});

Other

Some other features that comes with this package are following. See validation.other.test.js

• Custom Validation Error Response.
• bail key to prevent validation from keep checking if current validation fails.

License

MIT