Module: CanCan::ModelAdapters::ActiveRecordAdapter
- Included in:
- ActiveRecord3Adapter, ActiveRecord4Adapter
- Defined in:
- lib/cancan/model_adapters/active_record_adapter.rb
Instance Method Summary collapse
-
#conditions ⇒ Object
Returns conditions intended to be used inside a database query.
- #database_records ⇒ Object
-
#joins ⇒ Object
Returns the associations used in conditions for the :joins option of a search.
- #tableized_conditions(conditions, model_class = @model_class) ⇒ Object
Instance Method Details
#conditions ⇒ Object
Returns conditions intended to be used inside a database query. Normally you will not call this method directly, but instead go through ModelAdditions#accessible_by.
If there is only one “can” definition, a hash of conditions will be returned matching the one defined.
can :manage, User, :id => 1
query(:manage, User).conditions # => { :id => 1 }
If there are multiple “can” definitions, a SQL string will be returned to handle complex cases.
can :manage, User, :id => 1
can :manage, User, :manager_id => 1
cannot :manage, User, :self_managed => true
query(:manage, User).conditions # => "not (self_managed = 't') AND ((manager_id = 1) OR (id = 1))"
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# File 'lib/cancan/model_adapters/active_record_adapter.rb', line 19 def conditions if @rules.size == 1 && @rules.first.base_behavior # Return the conditions directly if there's just one definition tableized_conditions(@rules.first.conditions).dup else @rules.reverse.inject(false_sql) do |sql, rule| merge_conditions(sql, tableized_conditions(rule.conditions).dup, rule.base_behavior) end end end |
#database_records ⇒ Object
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# File 'lib/cancan/model_adapters/active_record_adapter.rb', line 63 def database_records if override_scope @model_class.where(nil).merge(override_scope) elsif @model_class.respond_to?(:where) && @model_class.respond_to?(:joins) if mergeable_conditions? build_relation(conditions) else build_relation(*@rules.map(&:conditions)) end else @model_class.all(conditions: conditions, joins: joins) end end |
#joins ⇒ Object
Returns the associations used in conditions for the :joins option of a search. See ModelAdditions#accessible_by
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# File 'lib/cancan/model_adapters/active_record_adapter.rb', line 55 def joins joins_hash = {} @rules.each do |rule| merge_joins(joins_hash, rule.associations_hash) end clean_joins(joins_hash) unless joins_hash.empty? end |
#tableized_conditions(conditions, model_class = @model_class) ⇒ Object
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# File 'lib/cancan/model_adapters/active_record_adapter.rb', line 30 def tableized_conditions(conditions, model_class = @model_class) return conditions unless conditions.is_a? Hash conditions.each_with_object({}) do |(name, value), result_hash| if value.is_a? Hash value = value.dup association_class = model_class.reflect_on_association(name).klass.name.constantize nested_resulted = value.each_with_object({}) do |(k, v), nested| if v.is_a? Hash value.delete(k) nested[k] = v else result_hash[model_class.reflect_on_association(name).table_name.to_sym] = value end nested end result_hash.merge!(tableized_conditions(nested_resulted, association_class)) else result_hash[name] = value end result_hash end end |