Amplify Appsync GraphQL

Prerequisite

• Install Create React App CLI

   npm install -g create-react-app
  

• Install the AWS Amplify CLI

   npm install -g @aws-amplify/cli
  

Custom resolvers workflow

• Step1: Add custom type to the schema

  • Add custom Query, Mutation or Subscription type to your schema.

• Step2: Create custom resolver template

  • Request and response template should be located in <project-root>/amplify/backend/api/<api-name>/resolvers folder.
  • Graphql Transformer follows <TypeName>.<FieldName>.<req/res>.vlt as convention to name the resolvers.
    • Request template: Query.myCustomQuery.req.vtl
    • Response template: Query.myCustomQuery.res.vtl

• Step3: Add resolvers resource by creating a custom stack

  • By default, there is a file called CustomResources.json in <project-root>/amplify/backend/api/<api-name>/stacks directory of your API.
  • Example: CustomResource.json

Examples

1. Basic models
2. Enable basic search
3. Fuzzy search
4. Query for Interface type
5. Search with AND/OR operations
6. Multi-fields search
7. Custom searchable input
8. Query for Union type
9. geolocation search capabilities

Launching the example app

Docs

• Resolver Mapping Template Reference