apollo-flow-components

Command-line tool to generate ready-to-use react-apollo flow typed Query and Mutation components. Utilizes type output from apollo-cli

Usage

# Use apollo-cli to get schema definition from graphql server
$ apollo schema:download --endpoint=http://localhost:3001/graphql schema.json

# Generate flow types from queries.graphql files
$ apollo codegen:generate --addTypename --schema=schema.json --target=flow src/types.js

# Generate components utilizing generated flow types
$ apollo-flow-components

A corresponding ApolloComps.js file will be generated next to each queries.graphql file, with one Query/Mutation component export for each operation defined in queries.graphql. The components automatically will have type-safety with the generated types and also will automatically pass down the query/mutation DocumentNode.

Assumptions

The generated files make some assumptions about how the consuming project is structured.

• query and mutation operations are defined in queries.graphql files
• The types generated from apollo-cli are accessible via import type { ... } from "types". To allow this:
  • module.system.node.resolve_dirname=./src in .flowconfig options
  • output generated types to src/types/apolloTypes.js, and then re-export them out of src/types/index.js using export type *

Example Output

Given a queries.graphql file:

query GetList(
  $first: Int!
  $after: String
) {
  list(
    first: $first
    after: $after
  ) {
    pageInfo {
      totalCount
    }
  }
}

mutation DeleteItem($input: DeleteItemInput!) {
  deleteItem(input: $input) {
    success
  }
}

apollo-flow-components will generate this ApolloComps.js file in the same directory:

/* DO NOT EDIT Generated using apollo-flow-components */
// @flow
import * as React from "react";
import { Query, Mutation } from "react-apollo";
import {
  GetList,
  DeleteItem
} from "./queries.graphql"
import type {
  GetList as GetListType,
  GetListVariables,
  DeleteItem as DeleteItemType,
  DeleteItemVariables
} from "types";

class GetListQueryClass extends Query<GetListType, GetListVariables> {};
class DeleteItemMutationClass extends Mutation<DeleteItemType, DeleteItemVariables> {};

export const GetListQuery = (props: $Diff<React.ElementConfig<typeof GetListQueryClass>, { query: any }>) => <GetListQueryClass query={GetList} {...props} />;
export const DeleteItemMutation = (props: $Diff<React.ElementConfig<typeof DeleteItemMutationClass>, { mutation: any }>) => <DeleteItemMutationClass mutation={DeleteItem} {...props} />;

Then, to utilize the components,

import { GetListQuery } from "./ApolloComps"

const Comp = () => (
  <GetListQuery variables={{ first: 10 }}>
    {({ data, loading, error }) => ... }
  </GetListQuery>
)