Installation

npm install --save @nodeteam/nestjs-pipes

Usage

// import pipes
import { WherePipe, OrderByPipe } from '@nodeteam/nestjs-pipes';
// import types
import { Pipes } from '@nodeteam/nestjs-pipes/index';

#OrderByPipe

@Query('orderBy', OrderByPipe) orderBy?: Pipes.Order,

Examples:

• Sort the rows by the column firstName in ascending order

https://example.com/?sortBy=firstName:asc

Test case:

  it('should convert value like "name:asc, address:desc" to { name: "asc", address: "desc" }', () => {
    const value = 'name:asc, address:desc';
    const result = pipe.transform(value);
    expect(result).toEqual({
      address: 'desc',
      name: 'asc',
    });
  });

#WherePipe

Operators realized:

in - where=zipCode: in array(11111, 22222)

lt - where=age: lt int(12)

lt - where=age: lt int(12)

lte - where=age: lte int(12)

gt - where=age: gt int(12)

gte - where=age: gte int(12)

equals - where=age: equals int(12)

not - where=age: not int(12)

contains - where=firstName: contains string(John) or where=firstName: contains John

startsWith - where=firstName: startsWith string(John) or where=firstName: startsWith John

endsWith - where=firstName: endsWith string(John) or where=firstName: endsWith John

every - where=firstName: every string(John) or where=firstName: every John

some - where=firstName: some string(John) or where=firstName: some John

none - where=firstName: none string(John) or where=firstName: none John

OR - where=OR:[ firstName: contains Jhon, lastName: contains Doe]

Where types realized:

string - where=firstName: contains string(John)

int - where=age: gt int(12)

float - where=age: gt float(12.5)

boolean - where=active: equals boolean(true)

bool - where=active: equals boolean(true)

date - where=createdAt: gt date(2019-01-01)

datetime - where=createdAt: gt datetime(2019-01-01 12:00:00)

array - where=zipCode: in array(int(111111), int(222222))

@Query('where', WherePipe) where?: Pipes.Where

Examples:

• Select all the rows where the column firstName is equal to John

https://example.com/?where=firstName:John

• Select all the rows where createdAt is greater than 2023-01-13 12:04:27.689

https://example.com/?where=createdAt: gt date(2023-01-13 12:04:27.689)

• Select all rows where id is not equal to 1

https://example.com/?where=id: not int(12)

• Select all rows where id is greater than 1 and email contains @gmail.com

https://example.com/?where=id: gt int(1), email: contains @gmail.com

• Select all rows where ids are 1, 2 or 3 or age is 18

https://example.com/?where=OR:[id: in array(1,2,3), age: int(18)]

• Select all rows where the user's email contains @gmail.com.

https://example.com/?where=user.email: contains @gmail.com

• Select all users whose firstName contains Admin but exclude users whose roles are CUSTOMER.

https://example.com/?where=profile.firstName: contains Admin, NOT: roles: hasSome CUSTOMER

• Select user who has the email [email protected] or verified users but exclude user whose email contains [email protected].

https://example.com/?where=OR:[ email: contains [email protected], isVerified: equals boolean(true) ],  NOT: email: contains [email protected]

WherePipe vs OrderByPipe

Examples:

• Select all the rows where the column firstName is equal to John and sort the rows by the column firstName in ascending order

https://example.com/?where=firstName:John&sortBy=firstName:asc

Test case:

  it('should parse "OR" with array values from string "OR:[id:in array(int(1),int(2),int(3)), user: contains Jhon]"', () => {
    const string =
      "OR:[id:in array(int(1),int(2),int(3)), user: contains Jhon]";

    expect(pipe.transform(string)).toEqual({
      OR: [
        {
          id: {
            in: [1, 2, 3]
          }
        },
        {
          user: {
            contains: "Jhon"
          }
        }
      ],
    });
  });

#SelectPipe

@Query('select', SelectPipe) select?: Pipes.Select

Examples:

• Select the columns firstName and lastName

https://example.com/?select=firstName,lastName

• Exclude the columns firstName and lastName

https://example.com/?select=-firstName,-lastName

Test case:

  it('should transform string user like { user:true }', () => {
    const value = 'user';

    const result = pipe.transform(value);

    expect(result).toEqual({
      user: true,
    });
  });