Javascript React Apollo:从组件状态动态更新GraphQL查询
我有一个组件,它使用Javascript React Apollo:从组件状态动态更新GraphQL查询,javascript,reactjs,graphql,react-apollo,Javascript,Reactjs,Graphql,React Apollo,我有一个组件,它使用react apollodecorator语法显示GraphQL查询的结果。查询接受一个参数,我希望根据组件状态动态设置该参数 考虑以下简化示例: import * as React from ‘react’; import { graphql } from ‘react-apollo’; import gql from ‘graphql-tag’; const myQuery = gql` query($active: boolean!) { it
react apollo
decorator语法显示GraphQL查询的结果。查询接受一个参数,我希望根据组件状态动态设置该参数
考虑以下简化示例:
import * as React from ‘react’;
import { graphql } from ‘react-apollo’;
import gql from ‘graphql-tag’;
const myQuery = gql`
query($active: boolean!) {
items(active: $active) {
}
}
`;
@graphql(myQuery)
class MyQueryResultComponent extends React.Component {
public render() {
return <div>
<input type=“checkbox” /* other attributes and bindings */ />
{this.props.data.items}
<div>;
}
}
import*as React from'React';
从'react apollo'导入{graphql};
从“graphql标签”导入gql;
常量myQuery=gql`
查询($active:boolean!){
项目(活动:$活动){
}
}
`;
@graphql(myQuery)
类MyQueryResultComponent扩展了React.Component{
公共渲染(){
返回
{this.props.data.items}
;
}
}
单击复选框后,我想重新提交查询,根据复选框的状态动态设置
myQuery
中的active
属性。为简洁起见,我省略了复选框的处理程序和绑定,但如何在状态更改时重新提交查询?创建一个新组件,该组件将从父组件传递属性活动
本程序在以下章节的react apollo
文档中有很好的解释:
基于您的示例和需求,我制作了一个演示,它托管在codesandbox上,并使用GraphQLAPI
演示:
Data.js
import React from 'react';
import PropTypes from 'prop-types';
import gql from 'graphql-tag';
import { graphql } from 'react-apollo';
const Data = ({ data }) =>
<div>
<h2>Data</h2>
<pre style={{ textAlign: 'left' }}>
{JSON.stringify(data, undefined, 2)}
</pre>
</div>;
Data.propTypes = {
active: PropTypes.bool.isRequired,
};
const query = gql`
query SearchAuthor($id: Int!) {
author(id: $id) {
id
firstName
lastName
}
}
`;
export default graphql(query, {
options(ownProps) {
return {
variables: {
// This is the place where you can
// access your component's props and provide
// variables for your query
id: ownProps.active ? 1 : 2,
},
};
},
})(Data);
import React, { Component } from 'react';
import Data from './Data';
class App extends Component {
constructor(props) {
super(props);
this.state = {
active: false,
};
this.handleChange = this.handleChange.bind(this);
}
handleChange() {
this.setState(prevState => ({
active: !prevState.active,
}));
}
render() {
const { active } = this.state;
return (
<div>
<h1>App</h1>
<div>
<label>
<input
type="checkbox"
checked={active}
onChange={this.handleChange}
/>
If selected, fetch author <strong>id: 1</strong>
</label>
</div>
<Data active={active} />
</div>
);
}
}
export default App;