使用 Apollo Client 动态设置 React 组件的 GraphQL 查询 [英] Dynamically set GraphQL queries for React components with Apollo Client

问题描述

我正在构建一个 React 前端，它允许用户从静态查询列表中选择一个活动"查询，并将结果展平到表格中.将 GraphQL 查询从高阶组件传递到嵌套子组件的最佳方法是什么?

我见过的大多数文档/解决方案都侧重于将静态查询与从组件状态的动态条件绑定到组件，这不符合我的目的，因为不同的静态查询具有不同的字段并查询不同的节点类型.

这里的最佳实践/推荐方法是什么?我觉得这不是一个非常独特的用例，但我似乎找不到任何可以做类似事情的例子.

我使用 Apollo-Client/Redux 作为我的客户端存储.

以下是组件的大致轮廓:

class GridViewPage extends React.Component{构造函数(道具，上下文){超级(道具，上下文)；this.state = {activeQuery = ... 存储选定的查询 ...};}使成为() {返回 (<div className="gridContainer">...此处的组件允许用户从活动列表中选择一个查询并将其/它的 ID/索引保存到状态...<面板可折叠>...一些工具栏组件...</面板>...此处的组件显示查询的结果(理想情况下通过接收查询或作为道具的结果?)...

);}}GridViewPage.propTypes = {网格:PropTypes.array.isRequired，动作:PropTypes.object.isRequired};函数 mapStateToProps(state, ownProps) {返回 {//接收可用查询列表作为道具网格:state.grids};}

解决方案

我们以下面的组件为例:

ProfileWithData.js

import React, { Component, PropTypes } from 'react';从'react-apollo'导入{graphql}；从'graphql-tag'导入gql；类配置文件扩展组件 { ... }Profile.propTypes = {数据:PropTypes.shape({加载:PropTypes.bool.isRequired，当前用户:PropTypes.object，}).是必须的，};//我们使用 gql 标签将我们的查询字符串解析为查询文档const CurrentUserForLayout = gql`查询 CurrentUserForLayout {当前用户 {登录头像网址}}`;const ProfileWithData = graphql(CurrentUserForLayout)(Profile);

使用高阶组件:

Profile.js

import React, { Component, PropTypes } from 'react';导出类配置文件扩展组件 { ... }Profile.propTypes = {数据:PropTypes.shape({加载:PropTypes.bool.isRequired，当前用户:PropTypes.object，}).是必须的，};

createProfileWithData.js

import React, { Component, PropTypes } from 'react';从'react-apollo'导入{graphql}；从./配置文件"导入{配置文件}导出默认函数 createProfileWithData(query) =>{返回graphql(查询)(配置文件)；}

然后你会像这样使用它:

Page.js

import React, { Component, PropTypes } from 'react';从'graphql-tag'导入gql；从 './createProfileWithData' 导入 createProfileWithData;类页面扩展组件{renderProfileWithData() {const { textQuery } = this.props;//最简单的方法，尽管您也可以将 gql 作为函数调用const graphQLQuery = gql`${textQuery}`;const profileWithDataType = createProfileWithData(graphQLQuery);返回 (<profileWithDataType/>);}使成为() {返回 (<div>..{this.renderProfileWithData()}..</div>)}}Profile.propTypes = {textQuery: PropTypes.string.isRequired,};

我想你明白了.

当然，您的 Profile 不会收到 props.data.currentUser，而是 props.data.* 取决于根查询，您将处理视内容而定.

注意:这是直接在 Stack Overflow 中编写的，所以如果您遇到任何问题 - lmk，我会修复它.

I'm building a React front end which allows users to select an "active" query from a list of static queries and flattens to the result to be displayed in a table. What is the best way to pass the GraphQL query from a higher-order component into a nested child component?

Most of the documentation/solutions that I've seen focus on binding a static query with dynamical conditions from component states to a component, which would not work for my purpose as the different static queries have varying fields and query different node types.

What is the best-practice/recommended approach here? I feel like this is not a very unique use case, but I can't seem to find any examples that would do something similar.

I'm using Apollo-Client/Redux as my client-side store.

Below is the rough outline of the component:

class GridViewPage extends React.Component{
  constructor(props, context) {
    super(props, context);
    this.state = {
      activeQuery = ... Stores the selected query ...
    };
  }

  render() {
    return (
      <div className="gridContainer">
        ...Component here allows users to select a query from the active list and saves it/it's ID/Index to the state...

        <Panel collapsible>
        ...Some toolbar components...
        </Panel>
        ...Component here displays the result of the query (Ideally by receiving the query or the result of as a prop?)...
      </div>
    );
  }
}

GridViewPage.propTypes = {
  grids: PropTypes.array.isRequired,
  actions: PropTypes.object.isRequired
};

function mapStateToProps(state, ownProps) {
  return {
      // Receives list of available queries as a prop
      grids: state.grids
  };
}

解决方案

Let's take, for example, the following component:

ProfileWithData.js

import React, { Component, PropTypes } from 'react';
import { graphql } from 'react-apollo';
import gql from 'graphql-tag';

class Profile extends Component { ... }
Profile.propTypes = {
  data: PropTypes.shape({
    loading: PropTypes.bool.isRequired,
    currentUser: PropTypes.object,
  }).isRequired,
};

// We use the gql tag to parse our query string into a query document
const CurrentUserForLayout = gql`
  query CurrentUserForLayout {
    currentUser {
      login
      avatar_url
    }
  }
`;

const ProfileWithData = graphql(CurrentUserForLayout)(Profile);

It would be quite easily wrapping it with a higher order component:

Profile.js

import React, { Component, PropTypes } from 'react';

export class Profile extends Component { ... }
Profile.propTypes = {
  data: PropTypes.shape({
    loading: PropTypes.bool.isRequired,
    currentUser: PropTypes.object,
  }).isRequired,
};

createProfileWithData.js

import React, { Component, PropTypes } from 'react';
import { graphql } from 'react-apollo';
import { Profile } from './Profile'

export default function createProfileWithData(query) => {
  return graphql(query)(Profile);
}

You would then use it like this:

Page.js

import React, { Component, PropTypes } from 'react';
import gql from 'graphql-tag';
import createProfileWithData from './createProfileWithData';

class Page extends Component {  

  renderProfileWithData() {

      const { textQuery } = this.props;
      // Simplest way, though you can call gql as a function too
      const graphQLQuery = gql`${textQuery}`;

      const profileWithDataType = createProfileWithData(graphQLQuery);

      return (
        <profileWithDataType />
      );
  }

  render() {

    return (<div>
                ..
                {this.renderProfileWithData()}
                ..
           </div>)
  }

}

Profile.propTypes = {
  textQuery: PropTypes.string.isRequired,
};

I think you get the point.

Of course, your Profile would not received props.data.currentUser, rather it would be props.data.* depending on the root queries, and you would handle it appropriately depending on the contents.

Note: this was written directly in Stack Overflow, so if you encounter any problems - lmk and I'll fix it.

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