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I suspect there's a simple query to be able to do this but it's not something I've tried before. I'm trying to create a user-friendly way for a client to, from within the category edit screen, to indicate that a given category should or should not display within a drop down on the site. The general idea is that while they may have 20 categories, only 3-5 of them would be seen as "primary" and therefore should display in the dropdown menu at the top of the site.

So for user friendliness, I though adding a custom category field with a simple select list of no vs. yes would be the way to go. But the channel categories loop doesn't have a search parameter, so I suspect that I will need a query to loop through the categories in the given group and pull out only those with the custom category field of "display" with a value of "yes".

Can a query expert out there help me out?

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You can use this simple query with Query module:

{exp:query sql="SELECT exp_categories.cat_id, exp_categories.cat_name, exp_categories.cat_url_title FROM exp_categories 
LEFT JOIN exp_category_field_data ON exp_category_field_data.cat_id=exp_categories.cat_id 
WHERE exp_categories.group_id=2 AND exp_category_field_data.field_id_1='Yes'"}

<p>{cat_name} :: {cat_url_title} </p>

{/exp:query}

Please note the "field_id_1" within WHERE condition. You need to have id of field instead of '1' and field id can get from "Custom Category Fields" under "ID" column.

Hope, it would help you.

| improve this answer | |
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You could do it that way by setting a custom field if you wanted. I've done a similar thing recently and used GWcode Categories to simply call out that custom field:

{exp:gwcode_categories channel="my_channel" custom_fields="yes" cat_url_title="{segment_2}" style="linear" limit="5"}
    ...
    {my_custom_category_field}
    ...
{/exp:gwcode_categories}

You'll have complete control with GWcode categories to organise your categories as you choose and easy access to custom fields. You can also run conditional checks on them if they contain a yes/no value for displaying in the dropdown menu.

| improve this answer | |
  • Handled that way though, it's going to return all categories and then within the loop I'd conditionally display the ones with "yes" - which I could do natively as well. I'd like to filter the categories before they're returned, ideally, much like the search param on the entries loop. I figure I should get better performance and variables like count, etc. would still be accurate. – Jean St-Amand Apr 12 '13 at 13:34
  • It depends on how fixed the categories are. You can limit by ID's, groups, etc. There's also entry_count for the counting purposes. – Ian Apr 12 '13 at 16:13

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