Views query alter is used to edit the query in views that we created using Drupal. In cases where we cannot add fields in views, we can use hook_views_query_alter to change the query in views.
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Example of views query alter by using join.
Here we added join using class views_join in Drupal. Drawing anime boy. It's a built-in function to represent a join and to create the SQL necessary to implement the join. Flower sketch easy.
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- When you first hear of Drupal's hookviewsqueryalter you think you get it. You understand Drupal's hook system (presumeably, otherwise start here), you've used other hooks before, maybe you even experience a twinge of guilty excitement that it's one of the hooks that hasn't been removed from Drupal 8.
- API: hookviewsqueryalter. If you are looking for a way to alter where conditions here is a great guide from Chapter3. Using hookviewsqueryalter to alter a query. Join queries and conditions are little different so here is how you do it. First, check the tables that you have in your query, it could be a table alias or a table name.
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Drupal 8 Hook_views_query_alter Add Where Condition
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