Thinkphpmodel certification is not acceptable

Thinkphpmodel verification is not feasible thinkphp & nbsp; model & nbsp; no verification result is not available. Why is my validation condition array? I am not allowed to verify the model in thinkphp & nbsp; model & nbsp; protected & nbsp; $ _ val thinkphp model

Thinkphp model verification failed
The list of my verification criteria is not available.
Why?

In the thinkphp model
Protected $ _ validate = array (); // write in this line

You can obtain the value by writing a condition.
However, in a specific model, such as UserModel, the value of the verification condition is not obtained when writing it.

You met.
My problem is that thinkphp model cannot be verified.
------ Solution --------------------
First, make sure you use D or M to call it.
D ("")-> create ();
------ Solution --------------------
Examples in the manual: D. Why are you using M unexpectedly?