Pass outer context variable into query loop

[carlomanf]

What problem does this address?

I'm making a block that implements a form of post-to-post relationships (in a private repository at the moment) and it needs to be able to access the value of the postId context variable outside a query loop when the block is inside the query loop.

What is your proposed solution?

I was able to achieve this by having the query loop pass the hard-coded context to apply_filters with the outer context as a second argument, and then using this and other filters in my own plugin.

		$block_content = (
			new WP_Block(
				$block->parsed_block,
				apply_filters(
					'query_loop_context',
					array(
						'postType' => get_post_type(),
						'postId'   => get_the_ID(),
					),
					$block->context
				)
			)
		)->render( array( 'dynamic' => false ) );

Possibly, it could also be done by replacing WP_Block::render with render_block, because render_block already has a filter that appears to do the same thing.

Whichever implementation, there should be a pathway for blocks inside a query loop to be able to access the outer context.

[carlomanf]

To clarify, the fact that postId is passed with a different value is not really relevant. The point is that any outer context variable is inaccessible from within the query loop, whether it's postId or something else, whether it gets passed with a different value or whether it just doesn't get passed at all.