React-Redux Thunk调用Flask API出现TypeError与Network Error排查

Let’s walk through the hints from your error logs and code structure to help you zero in on the problem:

• Reducer State Completeness: In your devsReducer, when handling the Start_Dev_Search action, you’re returning a new state object that only includes isFetching: true—but you’re omitting the existing devsArray from the previous state. Redux reducers need to preserve all unchanged state properties when updating; failing to do this can lead to unexpected state shape issues later in your component.

• Context Binding in renderList: When you call this.props.devsArray.map(this.renderList), the renderList method loses its component context (the this value). This means when renderList tries to access this.props.selectAd, this might be undefined—directly causing the TypeError: e is undefined you’re seeing.

• Network Error Mismatch: Even though Fiddler shows the request succeeded, axios might be throwing a network error due to a misconfigured response (like incorrect content type, browser-unrecognized CORS headers, or a parsing issue with the response data). Double-check how your Flask API sets response headers and the format of the returned data.

内容的提问来源于stack exchange，提问作者rishe