lib/dry/schema/macros/value.rb in dry-schema-1.3.2 vs lib/dry/schema/macros/value.rb in dry-schema-1.3.3

@@ -15,12 +15,12 @@
 
           if schema
             current_type = schema_dsl.types[name]
 
             updated_type =
-              if current_type.respond_to?(:of)
-                current_type.of(schema.type_schema)
+              if array?(current_type)
+                build_array_type(current_type, schema.type_schema)
               else
                 schema.type_schema
               end
 
             schema_dsl.set_type(name, updated_type)
@@ -35,9 +35,28 @@
 
           type_spec = opts[:type_spec]
           each(type_spec.type.member) if type_spec.respond_to?(:member)
 
           self
+        end
+
+        # @api private
+        def array?(type)
+          primitive_inferrer[type].eql?([::Array])
+        end
+
+        # @api private
+        def build_array_type(array_type, member)
+          if array_type.respond_to?(:of)
+            array_type.of(member)
+          else
+            raise ArgumentError, <<~ERROR.split("\n").join(' ')
+              Cannot define schema for a nominal array type.
+              Array types must be instances of Dry::Types::Array,
+              usually constructed with Types::Constructor(Array) { ... } or
+              Dry::Types['array'].constructor { ... }
+            ERROR
+          end
         end
 
         # @api private
         def respond_to_missing?(meth, include_private = false)
           super || meth.to_s.end_with?(QUESTION_MARK)