ajv-openapi

Ajv plugin that adds Open API v3 data types (formats: int32, int64, float, double, byte) validation.

Installation

npm install ajv ajv-openapi

Usage

const Ajv = require("ajv");
const openApi = require("ajv-openapi");
 
const ajv = openApi(new Ajv());

Configuration for full OpenAPI compatibility

By default, the plugin only adds missing formats to Ajv validator. To configure Ajv to be fully Open API v3 compliant, you should configure the plugin like this:

const Ajv = require("ajv");
const openApi = require("ajv-openapi");
 
const ajvOptions = {
    schemaId: "auto",
    format: "full",
    coerceTypes: true,
    unknownFormats: "ignore",
    useDefaults: true,
    nullable: true
};
 
const openApiOptions = {
    useDraft04: true
};
 
const ajv = openApi(
    new Ajv(ajvOptions),
    openApiOptions
);

Examples

console.log(ajv.compile({ type: "integer", format: "int32" })(2147483648));
console.log(ajv.compile({ type: "integer", format: "int32" })(-2147483649));
console.log(ajv.compile({ type: "integer", format: "int32" })(1.23));
console.log(ajv.compile({ type: "integer", format: "int32" })(123));
> false
> false
> false
> true
 
console.log(ajv.compile({ type: "integer", format: "int64" })(Number.MAX_VALUE));
console.log(ajv.compile({ type: "integer", format: "int64" })(Number.MIN_VALUE));
console.log(ajv.compile({ type: "integer", format: "int64" })(1.23));
console.log(ajv.compile({ type: "integer", format: "int64" })(123));
> false
> false
> false
> true
 
console.log(ajv.compile({ type: "number", format: "float" })(Number.MAX_VALUE));
console.log(ajv.compile({ type: "number", format: "float" })(Number.MIN_VALUE));
console.log(ajv.compile({ type: "number", format: "float" })(1.23));
console.log(ajv.compile({ type: "number", format: "float" })(123));
> false
> false
> true
> true
 
console.log(ajv.compile({ type: "number", format: "double" })(Number.MAX_VALUE));
console.log(ajv.compile({ type: "number", format: "double" })(Number.MIN_VALUE));
console.log(ajv.compile({ type: "number", format: "double" })(1.23));
console.log(ajv.compile({ type: "number", format: "double" })(123));
> true
> true
> true
> true
 
console.log(ajv.compile({ type: "string", format: "byte" })("MTIz"));
console.log(ajv.compile({ type: "string", format: "byte" })("abc"));
console.log(ajv.compile({ type: "string", format: "byte" })(1));
console.log(ajv.compile({ type: "string", format: "byte" })("5L2g5aW95ZWK"));
> true
> false
> false
> true