Migrating to 3.2

As of 3.2 GraphQL schema for Tyk API definitions (i.e api_definition.graphql) changed significantly, hence GraphQL API definitions created in previous beta versions are not supported via the UI and need to go through a manual migration.

Note

Before you continue, we strongly advise to simply create a new API and avoid migration of the API definition. You’ll achieve results faster and can avoid typos and errors that happens with the manual migration.

Note

Old API definitions will continue to work for the Tyk Gateway

The changes

To improve performance now a single Data Source can be used to link to multiple fields instead of having an independent data source for every field hence graphql.type_field_configurations is now obsolete and new data sources can be defined under graphql.engine.data_sources (see example below).
Data Source kind are REST or GraphQL regardless of your API being internal or not.
In case of internal APIs that are accessed via tyk://scheme, the graphql.engine.data_sources[n].internal property is set to true.
Each dataSources needs to be defined with a unique name graphql.engine.data_sources[n].name.
Each field connected to the data source is expected to be configured for mapping under graphql.engine.field_configs regardless of it requiring mapping or not.
It is important that all new GraphQL APIs have the version graphql.version property set to 2.

Examples

Old Data Source Config

"type_field_configurations": [
  {
    "type_name": "Query",
    "field_name": "pet",
    "mapping": {
      "disabled": true,
      "path": ""
    },
    "data_source": {
      "kind": "HTTPJSONDataSource",
      "data_source_config": {
        "url": "https://petstore.swagger.io/v2/pet/{{.arguments.id}}",
        "method": "GET",
        "body": "",
        "headers": [],
        "default_type_name": "Pet",
        "status_code_type_name_mappings": [
          {
            "status_code": 200,
            "type_name": ""
          }
        ]
      }
    }
  },
  {
    "type_name": "Query",
    "field_name": "countries",
    "mapping": {
      "disabled": false,
      "path": "countries"
    },
    "data_source": {
      "kind": "GraphQLDataSource",
      "data_source_config": {
        "url": "https://countries.trevorblades.com",
        "method": "POST"
      }
    }
  },
]

New Data Source Config

"engine": {
  "field_configs": [
    {
      "type_name": "Query",
      "field_name": "pet",
      "disable_default_mapping": true,
      "path": [
        ""
      ]
    },
    {
      "type_name": "Query",
      "field_name": "countries",
      "disable_default_mapping": false,
      "path": [
        "countries"
      ]
    },
  ],
  "data_sources": [
    {
      "kind": "REST",
      "name": "PetStore Data Source",
      "internal": false,
      "root_fields": [
        {
          "type": "Query",
          "fields": [
            "pet"
          ]
        }
      ],
      "config": {
        "url": "https://petstore.swagger.io/v2/pet/{{.arguments.id}}",
        "method": "GET",
        "body": "",
        "headers": {},
      }
    },
    {
      "kind": "GraphQL",
      "name": "Countries Data Source",
      "internal": false,
      "root_fields": [
        {
          "type": "Query",
          "fields": [
            "countries"
          ]
        }
      ],
      "config": {
        "url": "https://countries.trevorblades.com",
        "method": "POST",
        "body": ""
      }
    }
  ]
},

Example of new graphql definition

"graphql" : {
  "schema": "type Mutation {\n  addPet(name: String, status: String): Pet\n}\n\ntype Pet {\n  id: Int\n  name: String\n  status: String\n}\n\ntype Query {\n  default: String\n}\n",
  "enabled": true,
  "engine": {
    "field_configs": [
      {
        "type_name": "Mutation",
        "field_name": "addPet",
        "disable_default_mapping": true,
        "path": [""]
      },
      {
        "type_name": "Pet",
        "field_name": "id",
        "disable_default_mapping": true,
        "path": [""]
      },
      {
        "type_name": "Query",
        "field_name": "default",
        "disable_default_mapping": false,
        "path": ["default"]
      }
    ],
    "data_sources": [
      {
        "kind": "REST",
        "name": "Petstore",
        "internal": false,
        "root_fields": [
          {
            "type": "Mutation",
            "fields": ["addPet"]
          }
        ],
        "config": {
          "url": "https://petstore.swagger.io/v2/pet",
          "method": "POST",
          "body": "{\n  \"name\": \"{{ .arguments.name }}\",\n  \"status\": \"{{ .arguments.status }}\"\n}",
          "headers": {
            "qa": "{{ .request.header.qa }}",
            "test": "data"
          },
        }
      },
      {
        "kind": "REST",
        "name": "Local Data Source",
        "internal": false,
        "root_fields": [
          {
            "type": "Pet",
            "fields": ["id"]
          }
        ],
        "config": {
          "url": "http://localhost:90909/graphql",
          "method": "HEAD",
          "body": "",
          "headers": {},
        }
      },
      {
        "kind": "GraphQL",
        "name": "asd",
        "internal": false,
        "root_fields": [
          {
            "type": "Query",
            "fields": ["default"]
          }
        ],
        "config": {
          "url": "http://localhost:8200/{{.arguments.id}}",
          "method": "POST",
        }
      }
    ]
  },
  "execution_mode": "executionEngine",
  "version": "2",
  "playground": {
    "enabled": false,
    "path": ""
  },
  "last_schema_update": "2021-02-16T15:05:27.454+05:30"
}

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