I am open to debate on how we can best implement this enhancement. Though, I think the following adjustments would do.

@fzaninotto - Can you commit these changes to the core codes? I am dealing with the same problem as @0xDCA.

In admin-config, field.js

// https://github.com/marmelab/admin-config/blob/master/lib/Field/Field.js
add to class field attributes
this._disableSort = false; // line 9

// Add a get method and a set method.    

isDisableSort() {
    return this._disableSort;
}

disableSort() {
    this._disableSort = true;
    return this;
}

Update ng-repeat in grid template in src/javascripts/ng-admin/Crud/list/maDatagrid.js

<th ng-repeat="field in fields() track by $index"
ng-class="field.getCssClasses()" class="ng-admin-column-{{ ::field.name() }} ng-admin-type-{{ ::field.type() }}">

    // disable sort
    <a ng-if="field.isDisableSort() == false" ng-click="datagrid.sortCallback(field)">
        <span class="glyphicon {{ datagrid.sortDir === 'DESC' ? 'glyphicon-chevron-down': 'glyphicon-chevron-up' }}" ng-if="datagrid.isSorting(field)"></span>
        {{ field.label() }}
    </a>

    // remove ng-click event and replace a tag with span.    
    <span ng-if="field.isDisableSort() == true">
        {{ field.label() }}
    </span>
</th>

To disable column sort for a particular field, simply invoke disableSort().

 // for example in post.listView()
// https://github.com/marmelab/ng-admin/blob/master/examples/blog/config.js
     ....
            nga.field('tags', 'reference_many') // a Reference is a particular type of field that references another entity
                .targetEntity(tag) // the tag entity is defined later in this file
                .targetField(nga.field('name')) // the field to be displayed in this list
                .disableSort()
                .cssClasses('hidden-xs')
                .singleApiCall(ids => { return {'id': ids }; })
        ])

Remove Column from sorting #372

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