Merge pull request #3618 from projectblacklight/backport-config

[Backport 8.x] Set constraints_component in the config

Author: dnoneill

app/helpers/blacklight/catalog_helper_behavior.rb

@@ -197,7 +197,7 @@ def render_grouped_response? response = @response
   # Get the current "view type" (and ensure it is a valid type)
   #
   # @param [Hash] query_params the query parameters to check
-  # @return [Symbol]
+  # @return [Symbol] (e.g. :index, :gallery)
   def document_index_view_type query_params = params || {}
     view_param = query_params[:view]
     view_param ||= session[:preferred_view] if respond_to?(:session)

app/views/catalog/_constraints.html.erb

@@ -1 +1 @@
-<%= render (blacklight_config&.view_config(document_index_view_type)&.constraints_component || Blacklight::ConstraintsComponent).new(search_state: search_state) %>
+<%= render blacklight_config&.view_config(document_index_view_type)&.constraints_component.new(search_state: search_state) %>

lib/blacklight/configuration.rb

@@ -168,7 +168,7 @@ def initialized_default_configuration?
         # component class used to render the facet grouping
         facet_group_component: nil,
         # component class used to render search constraints
-        constraints_component: nil,
+        constraints_component: Blacklight::ConstraintsComponent,
         # component class used to render the search bar
         search_bar_component: nil,
         # component class used to render the header above the documents