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@genially/typeorm-mimic

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@genially/typeorm-mimic

typeorm-mimic is a small (but powerful) Node.js library to generate test data using only the TypeORM schema

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typeorm-mimic

typeorm-mimic is a simple (but powerful) Node.js library to generate test data using only the TypeORM schema.

Features

  • Generate random values depending on primitive data types (String, Number, Boolean, Date...)
  • Generate custom values for specific fields
  • Generate custom values that match non-primitive data types (email, phone, address...)
  • Ignore fields
  • Generate dates as object or string

Installation

npm install @genially/typeorm-mimic

Usage

mimic(model, opts)

Generates a mimetic document from schemaDefinition

  • schemaDefinition: TypeORM schema definition
  • opts: Generation options, where the options are in the following format:
        {
          ignore: Array,
          datesAsString: Boolean,
          custom: {
             field: {
               value: Any,
               type: String
             }
          }
        }
OptionTypeUsage
ignoreArrayIt can contains string paths or RegExp of fields to ignore during generation
datesAsStringBooleanReturn dates as Date or String
customObjectSpecial generator for specific fields
custom.field.valueAnyPredefined value to the given field
custom.field.typeStringData type to generate to the given field, in the format: "type.subtype". Examples: "internet.email" or "address.city". See Faker.js methods to know all supported data types

Usage Example

const { EntitySchema } = require('typeorm');
const mimic = require('@genially/typeorm-mimic');

const schemaDefinition = new EntitySchema({
  name: 'Test',
  columns: {
    name: {
      type: String,
      default: 'Mimic'
    },
    address: {
      type: String,
      nullable: true
    },
    email: {
      type: String
    },
    phones: {
      type: [String]
    },
    birth_date: {
      type: Date
    },
    role: {
      enum: [0, 1, 2]
    },
    is_student: {
      type: Boolean
    },
    created_at: {
      type: Date,
      default: Date.now
    }
  }
});

const randomObject = mimic(schemaDefinition, {
  ignore: ['address'],
  datesAsString: false,
  custom: {
    email: {
      type: 'internet.email'
    },
    phones: {
      type: 'phone.phoneNumber'
    },
    birth_date: {
      value: () => new Date('December 25, 1995 23:15:30')
    }
  }
});

console.log(randomObject);

/*
{
    name: "Mimic",
    email: 'Timmothy_Wuckert@gmail.com',
    birth_date: "1995-12-25T22:15:30.000Z",
    phones: [
      '(857) 375-1663',
      '(601) 926-2014',
      '(705) 324-8873 x9541',
      '(693) 690-3304 x99775',
      '1-088-666-8801 x6452',
      '1-125-206-1792',
      '607.384.4536',
      '228.058.0088 x91535'
    ],
    role: 0,
    birth_date: 1995-12-25T22:15:30.000Z,
    is_student: false,
    created_at: 1568388626896
}
*/

Testing

To run the test cases use npm test

typeorm-mimic is strongly inspired by mongoose-mimic, which provides similar features to Mongoose ODM.

License

Licensed under MIT

Keywords

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Package last updated on 20 Sep 2019

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