Thinkphp: why can't it be inserted only through native SQL statements? Add does not work.

First of all, let's take a look at the figure. it indicates that this is tp2.0 in advance, so I have written the following manuals. it should be correct. Question 1: print the POST data, it can be printed out. Is it because the form can be correctly submitted? 2: I am using the add method, that is, it cannot be inserted. it is...

First of all, let's take a look at the figure. it indicates that this is from tp2.0 in advance, so I have written all the following manuals. it should be correct.

Such a few tricks
1: printing POST data can be printed out. Is it because the form can be correctly submitted?

2: I used the add method, but I cannot insert it. why? I printed the statement. The statement is like this !!!

Why? I completely follow the instructions in the manual.

3: only the auto-increment id and the default sort of the 0int type are inserted.

I can only use this method to add it. The problem is that this is not a solution, and verification is troublesome. I just want to use the normal create

An expert !!!