loopback-graphql-ext-example

$ git clone https://github.com/atul-github/loopback-graphql-ext-example.git
$ cd loopback-graphql-ext-example
$ npm install
$ node .

This is example project to demonstrate features of loopback-graphql-ext project. This project is forked from loopback-example-relation and has added dependency to loopback-graphql-ext project.

Prerequisites

Before starting this tutorial, you must install:

• Node.js
• git client

Reference

• Refer to loopback-example-relation project to understand loopback models used in the project.

Play with loopback-graphql-ext

Open GraphiQL Editor at http://localhost:3000/graphiql

Example 1 - getting Customer records

 Customers{
find{
id
name
age
billingAddress{
id
street
city
state
zipCode
}
}
}

Example 2 - using simple filter

 Customers{
find (filter:{where:{name : "Customer D"}}) {
id
name
age
}
}

Example 3 - where age is greater than or eqal to 22

 Customers{
find (filter:{where:{ gte :{ age : 22 }}}) {
id
name
age
}
}

Example 4 - using 'and' filter

 Customers{
find (filter:{where: { and : [{ gt :{ age : 22 }}, {name:"Customer C"}] } } ) {
id
name
age
}
}

Note: See the limitation. gt is used before property which is not similar to loopback.

Example 5 - using 'and' filter and 'inq' filter

 Customers{
find (filter:{where: { and : [{ gt :{ age : 22 }}, {inq:{ name : ["Customer C", "Customer D"]}} ] } } ) {
id
name
age
}
}

Example 6 - additional nesting in filter with 'or' condition

 Customers{
find (filter:{where: {or : [ { and : [{ gt :{ age : 22 }}, {inq:{ name : ["Customer C", "Customer D"]}} ] }, {id : 1} ] } } ) {
id
name
age
}
}

Example 6 - using limit filter

{
Customers{
find(filter:{ limit:2, where:{gt:{age:20}}}){
id
name
age
}
}
}

Example 7 - using skip

 Customers{
find(filter:{where:{gt:{id:1 }}, skip : 1} ) {
id
name
age
}
}

Example 8 - using Order filter (single field)

 Customers{
find(filter:{order : name}) {
id
name
age
}
}

Example 9 - using Order filter (multiple fields)

 Customers{
find(filter:{order : [name, age]}) {
id
name
age
}
}

Example 10 - using Order filter (multiple fields)

 Customers{
find(filter:{order : [name_DESC, age]}) {
id
name
age
}
}

Note: See the use of DESC (descending). Not able to make like loopback ( order : [name desc, age] )