sofa-model
v0.2.0
Published
A simple model class to sanitize and validate your javascript data.
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Sofa Model
Sofa Model is a simple model class to sanitize and validate your data. It is 100% data store agnostic and perfect for use with schema-less NoSQL DBs like CouchDB.
Right now it is built for Node.js, but browser support is coming soon. It can be used 100% synchronously, or asynchronously based on Promises.
For issues and feature requests visit the issue tracker.
Build status
Basic Usage
var Model = require('sofa-model');
var testData = {
name: "Colin ",
age: "17",
telephones: {
home: "123",
mobile: "456"
},
role: "admin"
};
var userModelOptions = {
blacklist: [
"role"
],
sanitize: {
name: ["trim", "toUpperCase"],
age: "toInt",
"telephones.home": {prepend: "+1 "},
"telephones.mobile": {prepend: "+1 "}
},
validate: {
name: {presence: true},
age: {
presence: true,
numericality: {
onlyInteger: true,
greaterThanOrEqualTo: 21,
lessThan: 150,
message: "invalid age"
}
},
"telephones.home": {
presence: true
},
"telephones.work": {
presence: true
}
},
static: {
role: "user"
}
};
var UserModel = new Model(userModelOptions);
var testUser = new UserModel(testData);
var results = testUser.process().results;
var errors = testUser.errors;
console.log(results);
console.log(errors);
This outputs:
{
name: 'COLIN',
age: 17,
telephones: { home: '+1 123', mobile: '+1 456' },
role: 'user'
}
{
age: [ 'Age invalid age' ],
'telephones.work': [ 'Telephones work can\'t be blank' ]
}
Async Usage
Simply add async: true
to the options when you instantiate your model. Each transformation you apply to the model will then return a Promise that will resolve with the result of the transformation. If there are validation errors the promise will be rejected with the list of errors.
testModelOptions.async = true;
testUser.process()
.then(function(results) {
console.log('Yeah! Validation successful');
console.log(results);
}, function(errors) {
console.log('Oh snap, there were validation errors');
console.log(errors);
});
API
Creating your model
First set the options for your model, then create a new instance from the data you want to process.
var BlogpostModel = new Model(options);
var blogEntry = new BlogpostModel(data);
Validate
Validation is handled by Validate.js. Specify your validation constraints in options.validate
when you instantiate your model. To get a list of errors (with synchronous validation):
console.log(blogEntry.validate().errors);
Custom validator functions can be specified within the customValidators
field of your Model options. They work per the Validate.js documentation.
customValidators: {
checkMiss: function(value) {
var regex = /^Ms\.\s/;
if(!regex.test(value)) {
return "oh snap, " + value + " is not a Miss!";
}
}
}
Sanitize
Sanitize is handled mostly by Validator.js. options.sanitize
is an object where the keys correspond to the data fields you want to process. The value is either an array of operations you want to apply or an object where is key is an operation and the value represents the options for that operation.
sanitize: {
name: ["trim", "toUpperCase"],
age: "toInt",
"telephones.home": {prepend: "+1 "},
"telephones.mobile": {prepend: "+1 "}
}
Sanitize functions: (see the Validator.js documentation)
- toString
- toDate
- toFloat
- toInt
- toBoolean
- trim
- escape
- stripLow
- whiteList
- blackList
- normalizeEmail
- append (string)
- prepend (string)
- toUpperCase
- toLowerCase
- toTitleCase
Custom sanitizer functions can be specified within the customSanitizers
field of your Model options.
Whitelist
A list of fields that are allowed to be present in your output data. If the Whitelist option is specified, any field not specifically whitelisted will be removed.
Blacklist
A list of fields that are not allowed in your output data. Any field specified under blacklist will be removed if present.
Rename
An object where the keys are the fields you want to rename, and the values are what you want to change them to.
rename: {
username: '_id',
password: 'token'
}
Static
A list of static fields and their values that will be merged on top of your data.
static: {
type: 'blog_post'
}
Merge
An object that will be merged behind your data.
blogEntry.merge(template);
Process
Applies whitelist
, blacklist
, sanitize
, validate
, rename
, and static
in that order based on your options.
Results
For synchronous use, all of Sofa Model's methods are chained. To get the final results, simply access the results
property. Note that you need to specifically check the errors
property to detect validation errors.
For async use the results are returned as each promise resolves. Validation errors will cause the promise to reject.
var results = blogEntry.validate().sanitize().results;
Changes
0.2.0 (August 21, 2015)
- Breaking: Updated dependencies and there were some breaking changes in Validate.js, which could cause your models to behave differently. Specifically when you write custom async validators, you must use Promise.resolve(err) instead of reject. See their documentation for details.
0.1.0 (March 7, 2015)
- Initial release