field custom metadata

Change-Id: I8ad5fdfee9ff8ec138b1089541c9ab1558e80050
Implements-blueprint: field-custom-attribute

glare/objects/base.py

@@ -744,6 +744,8 @@ Possible values:
             schema['required_on_activate'] = False
         if field._default is not None:
             schema['default'] = field._default
+        if field.metadata is not None:
+            schema['metadata'] = field.metadata
 
         schema['filter_ops'] = field.filter_ops
 

glare/objects/meta/wrappers.py

@@ -32,7 +32,8 @@ DEFAULT_MAX_FOLDER_SIZE = 2673868800  # 2550 Megabytes
 class Field(object):
     def __init__(self, field_class, mutable=False, required_on_activate=True,
                  system=False, validators=None, nullable=True, default=None,
-                 sortable=False, filter_ops=None, description=""):
+                 sortable=False, filter_ops=None, description="",
+                 metadata=None):
         """Init and validate field.
         Each artifact field has several common properties:
 
@@ -82,6 +83,7 @@ class Field(object):
         self.required_on_activate = required_on_activate
         self.system = system
         self.sortable = sortable
+        self.metadata = metadata
 
         try:
             default_ops = self.get_default_filter_ops(self.element_type)
@@ -101,7 +103,8 @@ class Field(object):
             self.filter_ops = filter_ops
 
         self.field_props = ['mutable', 'required_on_activate', 'system',
-                            'sortable', 'filter_ops', 'description']
+                            'sortable', 'filter_ops', 'description',
+                            'metadata']
         self.description = description
 
     @staticmethod

glare/tests/functional/test_schemas.py

@@ -483,7 +483,15 @@ fixtures = {
                                   u'readOnly': True,
                                   u'sortable': True,
                                   u'type': [u'string',
-                                            u'null']}
+                                            u'null']},
+            u'metadata_attribute': {u'default': u'default',
+                                    u'filter_ops': [u'eq', u'neq', u'in'],
+                                    u'glareType': u'String',
+                                    u'maxLength': 255,
+                                    u'metadata': {
+                                        u'metadata1': u'value1',
+                                        u'metadata2': u'blahblahblah'},
+                                    u'type': [u'string', u'null']},
         }),
         u'required': [u'name'],
         u'title': u'Artifact type sample_artifact of version 1.0',

glare/tests/sample_artifact.py

@@ -135,7 +135,10 @@ class SampleArtifact(base_artifact.BaseArtifact):
                                 max_size=3),
         'system_attribute': Field(fields.StringField,
                                   system=True, sortable=True,
-                                  default="default")
+                                  default="default"),
+        'metadata_attribute': Field(fields.StringField, default="default",
+                                    metadata={"metadata1": "value1",
+                                              "metadata2": "blahblahblah"})
     }
 
     @classmethod