Having a hard time debugging error - Token '{' invalid key at column 2

Question

I have encountered an error which I'm unable to debug.

form-field.html

<div class='row form-group' ng-form="{{field}}" ng-class="{ 'has-error': {{field}}.$dirty && {{field}}.$invalid }">
    <label class='col-sm-2 control-label'> {{ field | labelCase }} <span ng-if='required'>*</span></label>
    <div class='col-sm-6' ng-switch='required'>

        <input ng-switch-when='true' ng-model='record[field][0]' type='{{record[field][1]}}' class='form-control' required ng-change='update()' ng-blur='blurUpdate()' />

        <div class='input-group' ng-switch-default>
            <input ng-model='record[field][0]' type='{{record[field][1]}}' class='form-control' ng-change='update()' ng-blur='blurUpdate()' />
            <span class='input-group-btn'>
                <button class='btn btn-default' ng-click='remove(field)'><span class='glyphicon glyphicon-remove-circle'></span></button> 
            </span>
        </div>
    </div>

    <div class='col-sm-4 has-error' ng-show='{{field}}.$dirty && {{field}}.$invalid' ng-messages='{{field}}.$error'>
        <p class='control-label' ng-message='required'> {{ field | labelCase }} is required. </p>
        <p class='control-label' ng-repeat='(k, v) in types' ng-message='{{k}}'> {{ field | labelCase }} {{v[1]}}</p>
    </div>
</div>

new.html

<h2> New Contact </h2>

<form name='newContact' novalidate class='form-horizontal'>
    <form-field record='contact' field='firstName' live='false' required='true'></form-field>



 <div class='row form-group'>
        <div class='col-sm-offset-2'>
            <button class='btn btn-primary' ng-click='save()'> Create Contact </button>
        </div>
    </div>
</form>

I'm getting the following error:

In the browser:

Error: [$parse:syntax] http://errors.angularjs.org/1.4.1/$parse/syntax?p0=%7B&p1=invalid%20key&p2=2&p3=%7B%7Bfield%7D%7D.%24error&p4=%7Bfield%7D%7D.%24error

On angular site:

Error: $parse:syntax Syntax Error Syntax Error: Token '{' invalid key at column 2 of the expression [{{field}}.$error] starting at [{field}}.$error].

Does someone know why? Thanks!

Solution 1

I notice that this error also happens when binding data to an attribute on a custom directive. Where

$scope.myData.value = "Hello!";

This causes the error:

<my-custom-directive my-attr="{{myData.value}}"></my-custom-directive>

But this works fine:

<my-custom-directive my-attr="myData.value"></my-custom-directive>

Solution 2

Your problem is here:

ng-class="{ 'has-error': {{field}}.$dirty && {{field}}.$invalid }"

Remove {{ }}:

ng-class="{ 'has-error': field.$dirty && field.$invalid }"

Also you have the same issue here:

ng-messages='{{field}}.$error'

Replace with:

ng-messages='field.$error'

However fixing those will most likely also cause an error for this line:

ng-message='{{k}}'

So you have to change it to:

ng-message='k'

Comments

[Thomas.Benz]

your answer is an excellent tip. By the way, is there a free good debugger that can be plugged in google Chrome to catch that error? I am an AngularJs newbie.

[Jeff Johny]

'field' is a scope variable. I want to update html with that scope variable. If we remove {{}} then 'field' couldn't reflect in html page. Any solution for that ?