Module: Hyrax::Collections::NestedCollectionQueryService

Defined in:
app/services/hyrax/collections/nested_collection_query_service.rb

Defined Under Namespace

Classes: NestingAttributes

Class Method Summary collapse

Class Method Details

.available_child_collections(parent:, scope:, limit_to_id: nil) ⇒ Array<SolrDocument>

What possible collections can be nested within the given parent collection?

Parameters:

  • parent (Collection)
  • scope (Object) —

    Typically a controller object that responds to ‘repository`, `can?`, `blacklight_config`, `current_ability`

  • limit_to_id (nil, String) (defaults to: nil) —

    Limit the query to just check if the given id is in the response. Useful for validation.

Returns:



35
36
37
38
39
 
# File 'app/services/hyrax/collections/nested_collection_query_service.rb', line 35

def self.available_child_collections(parent:, scope:, limit_to_id: nil)
  return [] unless parent.try(:nestable?)
  return [] unless scope.can?(:deposit, parent)
  query_solr(collection: parent, access: :read, scope: scope, limit_to_id: limit_to_id, nest_direction: :as_child).documents
end

.available_parent_collections(child:, scope:, limit_to_id: nil) ⇒ Array<SolrDocument>

What possible collections can the given child be nested within?

Parameters:

  • child (Collection)
  • scope (Object) —

    Typically a controller object that responds to ‘repository`, `can?`, `blacklight_config`, `current_ability`

  • limit_to_id (nil, String) (defaults to: nil) —

    Limit the query to just check if the given id is in the response. Useful for validation.

Returns:



49
50
51
52
53
 
# File 'app/services/hyrax/collections/nested_collection_query_service.rb', line 49

def self.available_parent_collections(child:, scope:, limit_to_id: nil)
  return [] unless child.try(:nestable?)
  return [] unless scope.can?(:read, child)
  query_solr(collection: child, access: :deposit, scope: scope, limit_to_id: limit_to_id, nest_direction: :as_parent).documents
end

.clean_lucene_error(builder:) ⇒ Blacklight::Solr::Request

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

clean query for !lucene error

Parameters:

Returns:

  • (Blacklight::Solr::Request) —

    cleaned and functional query



100
101
102
103
104
105
 
# File 'app/services/hyrax/collections/nested_collection_query_service.rb', line 100

def self.clean_lucene_error(builder:)
  # TODO: Need to investigate further to understand why these particular queries using the where cause fail when others in the app apparently work
  query = builder.query.to_hash
  query['q'].gsub!('{!lucene}', '') if query.key? 'q'
  query
end

.parent_and_child_can_nest?(parent:, child:, scope:) ⇒ Boolean

TODO:

Consider expanding from same collection type to a lookup table that says “This collection type can have within it, these collection types”

Note:

There is a short-circuit of logic; To be robust, we should ensure that the child and parent are in the corresponding available collections

Is it valid to nest the given child within the given parent?

Parameters:

  • parent (Collection)
  • child (Collection)
  • scope (Object) —

    Typically a controller object that responds to ‘repository`, `can?`, `blacklight_config`, `current_ability`

Returns:

  • (Boolean) —

    true if the parent can nest the child; false otherwise



118
119
120
121
122
123
124
 
# File 'app/services/hyrax/collections/nested_collection_query_service.rb', line 118

def self.parent_and_child_can_nest?(parent:, child:, scope:)
  return false if parent == child # Short-circuit
  return false unless parent.collection_type_gid == child.collection_type_gid
  return false if available_parent_collections(child: child, scope: scope, limit_to_id: parent.id).none?
  return false if available_child_collections(parent: parent, scope: scope, limit_to_id: child.id).none?
  true
end

.parent_collections(child:, scope:, page: 1) ⇒ Blacklight::Solr::Response

What collections is the given child nested within?

Parameters:

  • child (Collection)
  • scope (Object) —

    Typically a controller object that responds to ‘repository`, `can?`, `blacklight_config`, `current_ability`

  • page (Integer) (defaults to: 1) —

    Starting page for pagination

  • limit (Integer) —

    Limit to number of collections for pagination

Returns:

  • (Blacklight::Solr::Response) 


64
65
66
67
68
69
 
# File 'app/services/hyrax/collections/nested_collection_query_service.rb', line 64

def self.parent_collections(child:, scope:, page: 1)
  return [] unless child.try(:nestable?)
  query_builder = Hyrax::NestedCollectionsParentSearchBuilder.new(scope: scope, child: child, page: page)
  query = clean_lucene_error(builder: query_builder)
  scope.repository.search(query)
end

.valid_combined_nesting_depth?(parent:, child: nil, scope:) ⇒ Boolean

Does the nesting depth fall within defined limit?

Parameters:

  • parent (Collection)
  • child (nil, Collection) (defaults to: nil) —

    will be nil if we are nesting a new collection under the parent

  • scope (Object) —

    Typically a controller object that responds to ‘repository`, `can?`, `blacklight_config`, `current_ability`

Returns:

  • (Boolean) —

    true if the parent can nest the child; false otherwise



134
135
136
137
138
139
140
 
# File 'app/services/hyrax/collections/nested_collection_query_service.rb', line 134

def self.valid_combined_nesting_depth?(parent:, child: nil, scope:)
  # We limit the total depth of collections to the size specified in the samvera-nesting_indexer configuration.
  child_depth = child_nesting_depth(child: child, scope: scope)
  parent_depth = parent_nesting_depth(parent: parent, scope: scope)
  return false if parent_depth + child_depth > Samvera::NestingIndexer.configuration.maximum_nesting_depth
  true
end