Show Parent & Sibling Categories

Question

My category group looks like this:

• car seats
• strollers
  • travel systems
• gear
  • walkers
  • swings
• nursery

When I'm on the URL /products/category/gear, I want to display:

• gear (here)
  • walkers
  • swings

When I'm on the URL /products/category/walkers, I still want to display:

• gear
  • walkers (here)
  • swings

I don't want to display the entire category group, just the current category's parent and/or children and/or siblings.

Answer 1

I think NSM Categories, with its target_category param and {category_is_target} tag, could help. Also, Seg2Cat is useful for grabbing an ID from the category name in the URI.

Answer 2

Here's how I ended up doing it:

I used an embedded template and passed the current category ID as a variable:

{embed='_products/category_breadcrumb' cat_id='{if triggers:parent_cat_id_1}{triggers:parent_cat_id_1}{if:else}{triggers:cat_id_1}{/if}'}

The Zoo Triggers variable returns blank if the current category has no parent (meaning it's a top-level category), so I had to use a conditional to output the category ID if the current category is top-level.

Then in my embedded template:

{exp:gwcode_categories
  cat_id='{embed:cat_id}'
  style='linear'
}
  {if results_total > 1}
    {if cat_count == 1}
      <p class="category-filter">
        View: 
    {/if}

    {if cat_url_title == triggers:segment_3}
      <span class="here">{if depth == 1}All{/if}{if depth == 2}{cat_name}{/if}</span>
    {/if}

    {if cat_url_title != triggers:segment_3}
      <span><a href="{path='products/category/{cat_url_title}'}">{if depth == 1}All{/if}{if depth == 2}{cat_name}{/if}</a></span>
    {/if}

    {if cat_count == results_total}
      </p>
    {/if}
  {/if}
{/exp:gwcode_categories}

The caveat is that it only works with a 2-level category tree, but that's all I need for my specific situation.

I'm using the Zoo Triggers {triggers:parent_cat_id_1} and {triggers:cat_id_1} variables, but you could do the same thing with Low Seg2Cat {segment_1_category_parent_id} and {segment_1_category_id} variables.

I also used an embedded template to get the parse order right, but I imagine you could use Stash for this too.