我正在使用React with Redux并遇到此问题。
首先我要创建引入[
{
"Execution Time": 4863.615,
"Planning Time": 0.3,
"Plan": {
"Startup Cost": 383480149.03,
"Shared Hit Blocks": 1296773,
"Shared Written Blocks": 0,
"Shared Read Blocks": 267565,
"Plans": [
{
"Temp Written Blocks": 0,
"Sort Key": [
"((SubPlan 1)) DESC"
],
"Node Type": "Sort",
"Sort Space Used": 46,
"Shared Hit Blocks": 1296773,
"Plans": [
{
"Node Type": "Seq Scan",
"Shared Hit Blocks": 1296773,
"Plans": [
{
"Partial Mode": "Simple",
"Node Type": "Aggregate",
"Strategy": "Plain",
"Shared Hit Blocks": 1296773,
"Subplan Name": "SubPlan 1",
"Plans": [
{
"Exact Heap Blocks": 1383693,
"Node Type": "Bitmap Heap Scan",
"Shared Hit Blocks": 1296773,
"Plans": [
{
"Startup Cost": 0,
"Plan Width": 0,
"Temp Written Blocks": 0,
"Shared Written Blocks": 0,
"Shared Read Blocks": 5872,
"Local Written Blocks": 0,
"Node Type": "Bitmap Index Scan",
"Index Cond": "(indexed_field_2 @@ to_tsquery(prt.a)",
"Plan Rows": 3156,
"Temp Read Blocks": 0,
"Shared Dirtied Blocks": 0,
"Local Hit Blocks": 0,
"Parallel Aware": false,
"Actual Rows": 51,
"Local Dirtied Blocks": 0,
"Parent Relationship": "Outer",
"Total Cost": 43.68,
"Shared Hit Blocks": 173739,
"Actual Loops": 44742,
"Local Read Blocks": 0,
"Index Name": "part_ids2_idx"
}
],
"Shared Read Blocks": 266531,
"Relation Name": "ind",
"Local Hit Blocks": 0,
"Local Dirtied Blocks": 0,
"Temp Written Blocks": 0,
"Plan Width": 16,
"Actual Loops": 44742,
"Rows Removed by Index Recheck": 0,
"Lossy Heap Blocks": 0,
"Filter": "(lower(ind.t) <> ALL ('{a,b,c}'::text[]))",
"Alias": "ind",
"Recheck Cond": "(indexed_field_2 @@ to_tsquery(prt.a)",
"Temp Read Blocks": 0,
"Local Read Blocks": 0,
"Startup Cost": 44.46,
"Shared Dirtied Blocks": 0,
"Shared Written Blocks": 0,
"Local Written Blocks": 0,
"Plan Rows": 3109,
"Parallel Aware": false,
"Actual Rows": 51,
"Parent Relationship": "Outer",
"Total Cost": 8563.06,
"Rows Removed by Filter": 0
}
],
"Shared Read Blocks": 266531,
"Temp Written Blocks": 0,
"Local Dirtied Blocks": 0,
"Local Hit Blocks": 0,
"Plan Width": 8,
"Actual Loops": 44742,
"Temp Read Blocks": 0,
"Local Read Blocks": 0,
"Startup Cost": 8570.83,
"Shared Dirtied Blocks": 0,
"Shared Written Blocks": 0,
"Local Written Blocks": 0,
"Plan Rows": 1,
"Parallel Aware": false,
"Actual Rows": 1,
"Parent Relationship": "SubPlan",
"Total Cost": 8570.84
}
],
"Shared Read Blocks": 267565,
"Relation Name": "parties",
"Temp Written Blocks": 0,
"Local Dirtied Blocks": 0,
"Local Hit Blocks": 0,
"Plan Width": 24,
"Actual Loops": 1,
"Alias": "parties",
"Temp Read Blocks": 0,
"Local Read Blocks": 0,
"Startup Cost": 0,
"Shared Dirtied Blocks": 0,
"Shared Written Blocks": 0,
"Local Written Blocks": 0,
"Plan Rows": 44742,
"Parallel Aware": false,
"Actual Rows": 44742,
"Parent Relationship": "Outer",
"Total Cost": 383478215.31
}
],
"Shared Read Blocks": 267565,
"Local Hit Blocks": 0,
"Local Dirtied Blocks": 0,
"Sort Method": "top-N heapsort",
"Plan Width": 24,
"Actual Loops": 1,
"Temp Read Blocks": 0,
"Local Read Blocks": 0,
"Shared Written Blocks": 0,
"Startup Cost": 383480149.03,
"Shared Dirtied Blocks": 0,
"Sort Space Type": "Memory",
"Local Written Blocks": 0,
"Plan Rows": 44742,
"Parallel Aware": false,
"Actual Rows": 200,
"Parent Relationship": "Outer",
"Total Cost": 383480260.89
}
],
"Local Written Blocks": 0,
"Node Type": "Limit",
"Plan Rows": 200,
"Temp Read Blocks": 0,
"Shared Dirtied Blocks": 0,
"Local Hit Blocks": 0,
"Parallel Aware": false,
"Actual Rows": 200,
"Local Dirtied Blocks": 0,
"Temp Written Blocks": 0,
"Plan Width": 24,
"Actual Loops": 1,
"Local Read Blocks": 0,
"Total Cost": 383480149.53
},
"Triggers": []
}
]
的{{1}}组件并渲染：
EditorContainer.jsx：
EditorContainer
在EditorContainer.jsx中调度动作效果很好。
但是我想在我的Editor.jsx中发布一些动作，所以我这样做：
Editor.jsx
store当然，我在第3行收到未捕获的ReferenceError：商店未定义。
不应<Provider store={store}>
<Editor></Editor>
</Provider>在此处完成工作并包含class Editor extends React.Component {
componentWillMount() {
store.dispatch(doSomething());
}
render() {
return (
// code
);
}
}
const mapStateToProps = state => ({
somethingPayload: somethingPayload
});
export default connect(mapStateToProps)(Editor);
＆amp;在我的情况下，编辑组件中的connect？
答案 0 :(得分：2)
您应该使用this.props.dispatch代替store.dispatch，因为dispatch功能是通过道具传递的。