回流：讓多個組件訪問同一商店

Question

tl; dr ：每次我向其添加新Graph時，GraphStore的UUID都會更改。 這使我假設每個圖都在創建自己的唯一GraphStore。 我希望他們所有人共享一個商店。

我有一個包含多個Graph組件的React Dashboard組件。

我的Graph組件從儀表板傳遞了一個id道具。 然后使用該id在GraphStore中存儲的graphs數組中查找數據。 但是，在我看來，每個Graph都在創建自己的GraphStore，而不是共享相同的（期望的行為）。 如何使它們全部使用相同的GraphStore？

我曾考慮過從儀表板傳遞正確的GraphStore，但是我不可能讓每個Graph都監聽GraphStore中的更改。

我很高興不使用Reflux.connectFilter，但這似乎很完美。

我的代碼（至少是關鍵部分）：

儀表板

var React        = require('react');
var Graph        = require('./graph').Graph;
var GraphActions = require('./graphActions').GraphActions;
var UUID         = require('uuid');

var Dashboard = React.createClass({
    ...
    render: function() {
        var graphs = [];
        for(var i = 0; i < 10; ++i) {
            var id = UUID.v4();
            GraphActions.createGraph(id);
            graphs.push(
                <Graph id={id} />
            );
        }
    }
});

module.exports = {Dashboard: Dashboard}; 

圖形

var React      = require('react');
var GraphStore = require('./graphStore').GraphStore;

var Graph = React.createClass({
    mixins: [Reflux.connectFilter(GraphStore, "graph", function(){
        return graphs.filter(function(graph) {
            return graph.id === this.props.id;
        }.bind(this))[0];
    })],
    propTypes: {
        id: React.PropTypes.string
    },
    render: function() {
        // Needed because the AJAX call in GraphStore might not have completed yet
        if(typeof this.state.graph == "undefined") {
            return (<div>Graph loading...</div>);
        }

        return (<div>Data: {this.state.graph.data}</div>);
    }
});

module.exports = {Graph: Graph};

GraphStore

var Reflux       = require('reflux');
var jQuery       = require('jquery');
var GraphActions = require('./graphActions').GraphActions;
var UUID         = require('uuid');

var GraphStore = Reflux.createStore({
    listenables: [GraphActions],
    onCreateGraph: function(graphId) {
        console.log("GraphStore " + this.id + " is adding new graph " + graphId);

         jQuery.ajax({
              ...
              success: this.addGraph
         });
    },
    addGraph: function(data) {
        this.graphs.push(
            {
                id:   graphId,
                data: data
            }
        );

        this.trigger({graphs: this.graphs});
    },
    getInitialState: function() {
        this.graphs = [];

        // Here I give the store a UUID so I can identify it later
        this.id = UUID.v4();

        return {
            graphs: this.graphs
        };
    }
});

Answer 1

每當組件訂閱商店時，Reflux Store上的getInitialState觸發（這是該組件的初始數據）。

如果您只需要在商店上運行一次 ，請使用init ：

var GraphStore = Reflux.createStore({
    listenables: [GraphActions],
    init: function() {
        this.graphs = [];

        // Here I give the store a UUID so I can identify it later
        this.id = UUID.v4();
    },
    getInitialState: function() {
        return {
            graphs: this.graphs
        };
    }
});