使用angularfire2和angular 4检索数据

Question

My database is given here . I want to retrieve the total data tree of Post with the key under Post

I have tried with the code given below. but this provides me a list with 0 1 2 3 instead of original key ( KxZPLJh9k4ldXqz3gNF ) under Post

this.db.list('/post', ref => ref.orderByChild('course').equalTo("che101f")).valueChanges();

Is there any way to have my desired data tree ? If so how ?

Answer 1

valueChanges() strips the metadata, it's only intended for simple access to your JSON tree.

You should use snapshotChanges() if you want to access anything other than the JSON tree, such as pushIds.

Check out the docs here .