Pocket schema

Validates records against a schema.

Intended to be used within Pocket CMS

Table of Contents generated with DocToc

• Getting started
  • Installation
  • Usage
• Options
• Supported types
• Custom validators
• Adding custom types

Getting started

Installation

Install pocket-schema as dependency of your project

npm install --save pocket-schema

Usage

const Schema = require('pocket-schema');
 
// Create a schema
const personSchema = new Schema({
  additionalProperties: false,
  fields: {
    name: {
      type: 'string',
      required: true
    },
    origin: {
      type: 'select',
      options: [
        'earth',
        'mars',
        'pluto'	
      ]
    }
  }
});
 
// Validate data against the schema
const { errors, valid, data } = await personSchema.validate({
  name: 'john',
  origin: 'earth'
});
 

Options

The validate method has the following signature :

validate(payload : object, opts : ValidationOptions = {})

The following validation options are available :

• additionalProperties Whether extra properties are allowed in the schema. Defaults to true
• ignoreRequired If set to true, no error will be raised for missing properties marked as required:true

Supported types

• any

• array|list - options:

  • items? A field definition of the expected array items

• checkbox|boolean

• date - options:

  • format? The expected date format (defaults to YYYY-MM-DD)

• datetime

• email - options:

  • match? A regular expression to match the email against

• map - options:

  • items? A field definition of the expected map items

• multiselect - options:

  • options List or options to select from. An async function can also be passed

• number - options:

  • min? Minimum allowed value
  • max? Maximum allowed value

• object|json - options:

  • schema? Schema used to validate the object against

• password - options:

  • minLength? The minimum length of the password

• select|enum - options:

  • options List or options to select from. An async function can also be passed

• text|string - options:

  • minLength? The minimum length of the string
  • maxLength? The maximum length of the string
  • match? A regular expression to match the string against

• time

• timestamp

Custom validators

Additional validation can be performed if required by adding a validator method to a field.
The expected signature is the following :

validate(data: any, field: Field): Errors|Promise<Errors>

The validate method takes the data and the field as arguments, and returns a list or errors

e.g

const Schema = require('pocket-schema');
 
// Create a schema
const personSchema = new Schema({
  additionalProperties: false,
  fields: {
  email: {
    type: 'email',
    required: true,
    validate(email, field) {
      if (!/@mycompany.com/.test(email)) {
        return ['Invalid email domain'];
      }
      return null;
    }
  }
 }
});

Adding custom types

It is possible to register custom types with their custom validation.

Registering a pre-defined type will override the existing one.

const Schema = require('pocket-schema');
 
Schema.registerType('model', {
  aliases: [
    'record'
  ],
  async validate(data, field) {
    const recordId = data; 
    const record = await db.find({ id: recordId });
    
    if (!record) {
      return `Invalid id ${recordId}`;
    }
    return null;
  }
});