Graphql，react-apollo 如何在加载组件状态时将变量传递给查询 [英] Graphql, react-apollo how to transfer variable to query at loading component state

问题描述

我有一个简单的反应组件，必须在用户询问时从服务器加载数据.问题是我不知道如何传输动态变量 SpeakerUrl 并在组件加载状态之前访问它.当然我可以从 this.props.params 访问它，但是组件没有加载，我在进行 graphql 查询时无法访问它.查询 - QuerySpeaker 在我手动设置 url 变量时工作正常.

路由器

组件 - SpeakerPage

从'react'导入React；从'react-apollo'导入{graphql}；从'../redux/graphql/querys'导入{QuerySpeaker}；class SpeakerPage 扩展了 React.Component {使成为( ) {console.log( this.props );返回 (<div className="ui 容器"><div className="ui grid"><div className="row">你好

)}}导出默认 graphql(QuerySpeaker, {选项:({ url }) =>({ variables: { url } }) <- 这是我的问题，我该如何设置这个 url 变量?})( 演讲者页面 );

解决方案

基于 react-apollo documentation，传递给options函数的参数是传递给组件的props对象.当 react-router 渲染你的组件时，它会将 params 作为 prop 传递给它.这意味着 params 应该是传递给 options 函数的对象的属性.

导出默认graphql(QuerySpeaker, {选项:(道具)=>({ 变量: { url: props.match.params.speakerUrl } })})( 演讲者页面 );

I have a simple react component that must load data from server when user ask it. Problem is that i don't know how to transfer dynamic variable speakerUrl and access it in before component load state. Sure i can access it from this.props.params, but component is not loaded and i can't access it when i make a graphql query. Query - QuerySpeaker is working fine when i manualy set url variable.

Router

<Route path="/speaker/:speakerUrl" component={SpeakerPage} />

Component - SpeakerPage

import React from 'react';
import { graphql } from 'react-apollo';

import { QuerySpeaker } from '../redux/graphql/querys';

class SpeakerPage extends React.Component {
    render( ) {
        console.log( this.props );
        return (
            <div className="ui container">
                <div className="ui grid">
                    <div className="row">
                        Hello
                    </div>
                </div>
            </div>
        )
    }
}

export default graphql(QuerySpeaker, {
     options: ({ url }) => ({ variables: { url } }) <- here is my problem, how can i set this url variable?
})( SpeakerPage );

解决方案

Based on the react-apollo documentation, the argument passed to the options function is the props object passed to the component. When react-router renders your component, it passes it the params as a prop. That means that params should be a property of the object passed to the options function.

export default graphql(QuerySpeaker, {
  options: (props) => ({ variables: { url: props.match.params.speakerUrl } })
})( SpeakerPage );

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