Issue with angular material and ng-messages - angularjs

Question

if I provoke 'min-length' error and then try to provoke 'required' error, the latter isn't shown, although the input is underlined in red.
<md-input-container class="md-block">
<label for="register_password">Password</label>
<input required minlength="6" maxlength="100" type="password" name="register_password" id="register_password" ng-model="registerData.password">
<div ng-messages="registerForm.register_password.$error">
<div ng-message="maxlength">The password should be shorter</div>
<div ng-message="minlength">The password should be at least 6 characters long</div>
<div ng-message="required">Required</div>
</div>
</md-input-container>
Full working example:
http://codepen.io/AndriusRimkus/pen/mPEjYX
Thanks!

Answer 1

You should use the following code
<md-input-container class="md-block">
<label for="register_password">Password</label>
<input required minlength="6" md-maxlength="100"
type="password" name="register_password"
id="register_password" ng-model="registerData.password">
<div ng-messages="registerForm.register_password.$error">
<div ng-message-exp="['required', 'minlength']">
The password shold be at least 6 characters long</div>
<!-- <div ng-message="minlength">The password should be at least 6 characters long</div> -->
<div ng-message="md-maxlength">The password should be shorter</div>
</div>
</md-input-container>
So there are many things you should consider. Since you are using angular material design I think you should use md-maxlength which will show a hint for how many charcters written against maxlength. I am not sure if there is any md-minlength directive is available. Now require and minlength is kind of same thing so I think you should combine those two as a single error message. Now There are some specific things releated to [ngMessages][1] check the documentaion for detail explation. I'll say couple of things about that. By default ngMessges only displays one error message and if there are more than 1 error message are valid then which ever comes first in DOM will be displayed. you can use multiple or ng-messages-multiple to display more than 1 error messages. I suggest you should write you error in incrementing order like required first followed by minlength(If you want to display it seperately) and at the end md-maxlength. You can use ng-message-exp to combine more than 1 error codes.

Answer 2

Your code is correct but there is one point.
You are using an old version of AngularJS Material.
If You change the last script with this lines then your code will be run properly.
<!-- Angular Material Library -->
<!-- Version 1.1.4 -->
<script src="https://material.angularjs.org/latest/angular-material.min.js"></script>
Check online
Good Luck