rails polymorphism problem: I now have questions , articles , comments three models, one question corresponds to multiple comments , and a article corresponds to multiple comments . Now how to submit comments under question ? my model...
suppose that ABCD class, BC virtual inheritance from AMagle D inherited from BC,A class virtual function (not overridden at the same time in BC) and member variables belong to the internal of the class, if both of them solve the ambiguity, it can be solv...
there is a field in the QaAnswer table in this table. When json returns, I want to add a field to QaAnswer. I don t know how to add it . class QaAnswer(db.Model): __tablename__ = qa_answer id = db.Column(db.Integer, primary_key=True) a...
deleteProduct(idx, rows,id){ this.$confirm( ? , { confirmButtonText: , cancelButtonText: , type: warning }).then(() => { ...
I find that when I adjust my screen resolution, the page layout will change. Do you want to adapt as well as the mobile terminal? ...
$coinbasePublicAPI = https: api.coinmarketcap.com. ;$coinData = file_get_contents ($coinbasePublicAPI); var_dump ($coinData); Why is the result NULL empty ) original: https: stackoverflow.com que. is it that the person who asked the questio...
the official reply is that the attribute change will lead to the overall element render , not setAttribute . Thank you for your answer. Give + 1 official reply . < hr > probably guessed , whether the property change caused the logic of the render...