Profile: Franck

Problem:

Setup a view for listing child post, and filter it by the fields of parent field.

Solution:

Views is using wordpress class WP_Query to query the posts in database:

https://codex.wordpress.org/Class_Reference/WP_Query#Custom_Field_Parameters

According to wordpress document, there isn't such a feature to filter the query by different custom fields from different post types, it will conduct the problem you mentioned above:

view dosn't show items

In your case, I suggest you setup both custom fields "Date" and "Price" into the same child post type, then you can setup the view:

1) Query only one post type

2) And filter by both custom fields.

3) And in the view's loop, you can display the parent post information

Relevant Documentation:

https://toolset.com/documentation/user-guides/displaying-fields-of-parent-pages/