Pleco Joi

Table of Contents

• Overview
• Joi Validation Schemas
  • Provided Exports
    • Usage
    • Usage
• Resources

Overview

The Joi validation schemas provide additional protection around what the user inputs.

Joi Validation Schemas

Provided Exports

filterQuerySchema: a function that returns the schema pertaining to the IFilterQuery typescript type or the FilterQuery_* GraphQL type.

The rules for filters are:

• each filter query can contain nested AND or OR
• each filter object can have multiple operators
• each filter can only have the keys specified in the schema
• the filter can be empty

Usage

import { filterQuerySchema } from '@dialexa/pleco-joi';
import Joi from 'joi';

const vehicleFilterSchema = Joi.object().keys({
  AND: Joi.array().items(Joi.lazy(() => vehicleFilterSchema)),
  OR: Joi.array().items(Joi.lazy(() => vehicleFilterSchema)),
  make: filterQuerySchema('String', Joi.string()),
  model: filterQuerySchema('String', Joi.string()),
  // We can define any Joi schema
  numberOfUsers: filterQuerySchema('Int', Joi.number().integer().min(0)),
  highwayMPG: filterQuerySchema('Int', Joi.number().integer().min(0)),
  cityMPG: filterQuerySchema('Int', Joi.number().integer().min(0)),
  userSurveyRating: filterQUerySchema('Float', Joi.number().min(0).max(100)),
});

sortDirectionSchema: validates that the argument to a sort operation is 'ASC' or 'DESC' (case insensitive). Validating against this schema will also automatically convert the input to uppercase.

Usage

import { sortDirectionSchema } from '@dialexa/pleco-joi';
import Joi from 'joi';

const vehicleSortSchemaKeys = {
  numberOfUsers: sortDirectionSchema,
  userSurveyRating: sortDirectionSchema,
};

const vehicleSortSchema = Joi.object().keys(vehicleSortSchemaKeys).oxor(Object.keys(vehicleSortSchemaKeys));

limitOffsetPageSchema: validates that an object containing optional limit and offset are non-negative integers

Resources

• GraphQL Types
• Typescript Types