Angular Firestore获取单个文档

Question

angular firestore get document giving error during assignment. data is visible in console log, but not working in other cases.

Answer 1

You need to declare the product variable with its type

product : Product; 

or

product : any;

EDIT: As yurzui mentioned in the above comment, you should use arrow function to refer the context, so that this.product will be defined

Answer 2

We should use arrow function to retain context this . ( get().then((doc) => ) As yurzui commented.