How to retrieve/pass current entry id within another channel entries tag pair?

Question

I am currently trying to loop through channel "promos", where each entry has a Playa field designating which entries that particular promo should display on:

{exp:channel:entries channel="promos" orderby="promos_order"}
    {exp:playa:children field="promos_show_on_page" child_id="{current_entry_id}" var_prefix="playa"}
        <a href='{promos_link}'><img src="{promos_image}" /></a>
    {/exp:playa:children}
{/exp:channel:entries}

My issue is that I don't know how to pass in the current_entry_id to the child_id parameter.

Is this possible with or without any particular plugins or extensions, or am I going about this in the completely wrong way?

Answer 1

You want to use playa:parents, not channel:entries. Playa will infer the entry_id so long as you place this tag loop within the channel:entries tag of the entry you're viewing. (You can pass it via the entry_id parameter if you like.)

{exp:playa:parents channel="promos" field="promos_show_on_page" orderby="promos_order"}
    <a href='{promos_link}'><img src="{promos_image}" /></a>
{/exp:playa:parents}

Answer 2

It doesn't seem to me like you would need the child_id param if you're looking for the playa loop to display the children of each entry in your promos entries loop of the "promos" channel. It would do that automatically, with each loop being within each returned entry of the entries loop. Without that parameter, the children loop would assume the parent to be the current entry.

Answer 3

I may be missing something here, but you should just be able to use the {entry_id} tag as mentioned in the playa docs here.

entry_id

The parent entry’s ID(s). If your tag is within an {exp:channel:entries} tag pair, this will default to the current entry’s ID.

So you would have something like this:

{exp:channel:entries channel="promos" orderby="promos_order"}
    {exp:playa:children field="promos_show_on_page" child_id="{entry_id}" var_prefix="playa"}
        <a href='{promos_link}'><img src="{promos_image}" /></a>
    {/exp:playa:children}
{/exp:channel:entries}

UPDATE Using the example I described below, you would use embed variables. Once you pass the variable and value to the embed template, you can use it instead like this:

{exp:channel:entries channel="promos" orderby="promos_order"}
    {exp:playa:children field="promos_show_on_page" child_id="{embed:main_entry_id}" var_prefix="playa"}
        <a href='{promos_link}'><img src="{promos_image}" /></a>
    {/exp:playa:children}
{/exp:channel:entries}