Field:-ScopedHasManyField.md

+> Based on administrate `0.11.0`
+
+The `BelongsTo` field has an option `scope`, but the `HasMany` always calls `associated_class.all`. This is an extension field to provide this functionality to `HasMany` associations.
+
+```ruby
+require "administrate/field/has_many"
+
+class ScopedHasManyField < Administrate::Field::HasMany
+  protected
+
+  def self.field_type
+    superclass.field_type
+  end
+
+  private
+
+  def candidate_resources
+    scope = options[:scope] ? options[:scope].call(self) : associated_class.all
+    scope = scope.includes(*options.fetch(:includes)) if options.key?(:includes)
+
+    order = options.delete(:order)
+    order ? scope.reorder(order) : scope
+  end
+end
+```
+
+You can now use this in `ATTRIBUTE_TYPES`:
+```ruby
+class FooDashboard < Administrate::BaseDashboard
+ATTRIBUTE_TYPES = {
+  bar: ScopedHasManyField.with_options(scope: -> (field) { OtherModel.where(foo: field.resource) }),
+}
+```
+
+Now your `has_many` candidates is limited to the current `foo` instance.
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