使用Apollo Client动态设置React组件的GraphQL查询

时间:2017-03-02 07:56:57

标签: reactjs react-redux graphql react-apollo

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“活动”查询,并展平到要在表格中显示的结果。将GraphQL查询从更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/解决方案都专注于将动态条件从组件状态绑定到组件的静态查询,这对我的目的不起作用,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。

这里的最佳做法/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类似的例子。

我正在使用Apollo-Client / Redux作为我的客户端商店。

以下是该组件的粗略轮廓:

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 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
  };
}

1 个答案:

答案 0 :(得分:3)

我们来看,例如,以下组件:

<强> ProfileWithData.js

> var a = (0);
< undefined
> a
< 0

使用higher order component

很容易包装它

<强> Profile.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);

<强> createProfileWithData.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,
};

然后你会像这样使用它:

<强> Page.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);
}

我认为你明白了。

当然,您的个人资料不会收到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, }; ,而是props.data.currentUser,具体取决于根查询,您可以根据内容对其进行适当处理。

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