Objection graphql schema generator
npm install objection-graphql-generator#### Model
``
import {CustomModel as Model} from objection-graphql-generator;
export default class Course extends Model {
name?: string
description?: string
category?: any
static get tableName() {
return 'course'
}
static get jsonSchema() {
return {
type: 'object',
properties: {
id: {type: 'integer'},
name: {type: 'string'},
description: {type: 'string'},
categoryId: {type: 'integer'},
category: {type: 'object'},
}
}
}
static graphqlOptions = {
generateDefaultQueries: true,
generateDefaultMutations: true
}
static get relationMappings() {
const CATEGORY = require('./Category').default;
return {
category: {
graphql: true,
connectType: 'one',
relation: Model.BelongsToOneRelation,
modelClass: CATEGORY,
join: {
from: 'course.categoryId',
to: 'category.id'
}
},
}
}
}
`
import {makeExecutableSchema} from '@graphql-tools/schema';
import {SchemaBuilder} from 'objection-graphql-generator'
import {AuthenticationError} from "apollo-server-express";
import Course from "./models/Course";
import Category from "./models/Category";
const modelArray = [Course, Category]
const schemaBuilder = new SchemaBuilder(modelArray, {
mutationFunction: async (a,b,context,d) => {
const isAdmin = context.req.headers['userId'] === '1'
if(!isAdmin) return new AuthenticationError('Access denied')
}
}).build()
const schema = makeExecutableSchema(schemaBuilder)
`
`
mutationOptions: true // create, update, delete mutations
queryOptions: true // single and multiple query
extendQueries: "string" // Custom Query typedefs
extendMutations: "string" // Custom Mutation typedefs,
extendTypes: "string" // Custom regular typedefs
extendResolvers: {} // Custom regular resolvers
extendMutationResolvers: {} // Custom mutation resolvers
extendQueryResolvers: {} // Custom query resolvers CustomResolver,
extendProps: {id: 'string'} // Additional props for queries. Useful for adding primary key and timestamps
queryFunction: (root,args,context,info)=>{} // This function will run before every single query, useful for authentication.
mutationFunction: (root,args,context,info)=>{} // This function will run before every single query, useful for authentication.