EE2 Channel Form: How to keep value in checkbox category?

Question

I am (again) struggling with how to keep the value in a Channel Form when showing category as checkboxes. There are quite a few posts here but I seem not to find the answer. Please, who can help me here with a piece of code that really works. This is my code, this does NOT keep the value.

{categories show_group="5"}

    <label class="checkbox">{category_name}
    <input type="checkbox" id="{category_id}" name="{category_id}[]" value="{category_id}"{checked}>
    </label>

  {/categories}

Thanks, and a Happy New Year

Answer 1

I am not sure what you mean with "keep the value" - The input type checkbox can have the attribute "checked" (resulting in a tick being displayed in the checkbox) - the value property does not set the tick.

When you run the above code of yours and look at the output - what does EE put there? Where does "{checked}" come from?

If you want to have the checkbox in checked status you will have to include some sort of IF statement:

<input type="checkbox" id="{category_id}" name="{category_id}[]" value="{category_id}" {if condition}checked{/if} />

===(Updated after comment)====

If you want to allow the user to edit the Channel Entry <--> Category relation without giving them full access to the Control Panel there are two approaches:

1.) Use the Channel Form (ex SafeCracker) https://docs.expressionengine.com/latest/channel/channel_form/#categories

2.) Customize the CP for your users: https://devot-ee.com/add-ons/zoo-flexible-admin

Answer 2

Now that I understand what you are trying to achieve - Did you look at this Q&A?

Outputting categories as checkboxes - exp:channel:form / safecracker

Answer 3

Finally got it right.

<legend>Välj en grupp</legend>
      {categories group_id="5"}
        <label class="checkbox" for="{category_name}">{category_name}
        <input type="checkbox" name="category[]" id="{category_name}" value="{category_id}"{checked}>
        </label>
      {/categories}