hidden attributes continued (#1091)

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ### 0.14.3 -- TBD
 - Fixed - Added encapsulating double quotes to comply with [DOT language](https://graphviz.org/doc/info/lang.html) - PR [#1177](https://github.com/datajoint/datajoint-python/pull/1177)
+- Added - Ability to set hidden attributes on a table - PR [#1091](https://github.com/datajoint/datajoint-python/pull/1091)
 
 ### 0.14.2 -- Aug 19, 2024
 - Added - Migrate nosetests to pytest - PR [#1142](https://github.com/datajoint/datajoint-python/pull/1142)

datajoint/declare.py

@@ -6,6 +6,7 @@
 import re
 import pyparsing as pp
 import logging
+from hashlib import sha1
 from .errors import DataJointError, _support_filepath_types, FILEPATH_FEATURE_SWITCH
 from .attribute_adapter import get_adapter
 from .condition import translate_attribute
@@ -310,6 +311,18 @@ def declare(full_table_name, definition, context):
         external_stores,
     ) = prepare_declare(definition, context)
 
+    metadata_attr_sql = [
+        "`_{full_table_name}_timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP"
+    ]
+    attribute_sql.extend(
+        attr.format(
+            full_table_name=sha1(
+                full_table_name.replace("`", "").encode("utf-8")
+            ).hexdigest()
+        )
+        for attr in metadata_attr_sql
+    )
+
     if not primary_key:
         raise DataJointError("Table must have a primary key")
 

datajoint/heading.py

@@ -33,6 +33,7 @@
         is_attachment=False,
         is_filepath=False,
         is_external=False,
+        is_hidden=False,
         adapter=None,
         store=None,
         unsupported=False,
@@ -120,7 +121,7 @@ def table_status(self):
     def attributes(self):
         if self._attributes is None:
             self._init_from_database()  # lazy loading from database
-        return self._attributes
+        return {k: v for k, v in self._attributes.items() if not v.is_hidden}
 
     @property
     def names(self):
@@ -300,6 +301,7 @@ def _init_from_database(self):
                 store=None,
                 is_external=False,
                 attribute_expression=None,
+                is_hidden=attr["name"].startswith("_"),
             )
 
             if any(TYPE_PATTERN[t].match(attr["type"]) for t in ("INTEGER", "FLOAT")):

tests/test_blob_matlab.py

@@ -34,7 +34,7 @@ def insert_blobs(schema):
 
     schema.connection.query(
         """
-    INSERT INTO {table_name} VALUES
+    INSERT INTO {table_name} (`id`, `comment`, `blob`) VALUES
     (1,'simple string',0x6D596D00410200000000000000010000000000000010000000000000000400000000000000630068006100720061006300740065007200200073007400720069006E006700),
     (2,'1D vector',0x6D596D0041020000000000000001000000000000000C000000000000000600000000000000000000000000F03F00000000000030400000000000003F4000000000000047400000000000804E4000000000000053400000000000C056400000000000805A400000000000405E4000000000000061400000000000E062400000000000C06440),
     (3,'string array',0x6D596D00430200000000000000010000000000000002000000000000002F0000000000000041020000000000000001000000000000000700000000000000040000000000000073007400720069006E00670031002F0000000000000041020000000000000001000000000000000700000000000000040000000000000073007400720069006E0067003200),

tests/test_declare.py

@@ -360,3 +360,11 @@ class Table_With_Underscores(dj.Manual):
         dj.DataJointError, match="must be alphanumeric in CamelCase"
     ) as e:
         schema_any(Table_With_Underscores)
+
+
+def test_hidden_attributes(schema_any):
+    assert (
+        list(Experiment().heading._attributes.keys())[-1].split("_")[2] == "timestamp"
+    )
+    assert any(a.is_hidden for a in Experiment().heading._attributes.values())
+    assert not any(a.is_hidden for a in Experiment().heading.attributes.values())

tests_old/test_blob_matlab.py

@@ -40,7 +40,7 @@ def insert_blobs():
 
     schema.connection.query(
         """
-    INSERT INTO {table_name} VALUES
+    INSERT INTO {table_name} (`id`, `comment`, `blob`) VALUES
     (1,'simple string',0x6D596D00410200000000000000010000000000000010000000000000000400000000000000630068006100720061006300740065007200200073007400720069006E006700),
     (2,'1D vector',0x6D596D0041020000000000000001000000000000000C000000000000000600000000000000000000000000F03F00000000000030400000000000003F4000000000000047400000000000804E4000000000000053400000000000C056400000000000805A400000000000405E4000000000000061400000000000E062400000000000C06440),
     (3,'string array',0x6D596D00430200000000000000010000000000000002000000000000002F0000000000000041020000000000000001000000000000000700000000000000040000000000000073007400720069006E00670031002F0000000000000041020000000000000001000000000000000700000000000000040000000000000073007400720069006E0067003200),

tests_old/test_declare.py

@@ -341,3 +341,12 @@ class WithSuchALongPartNameThatItCrashesMySQL(dj.Part):
                 definition = """
                 -> (master)
                 """
+
+    @staticmethod
+    def test_hidden_attributes():
+        assert (
+            list(Experiment().heading._attributes.keys())[-1].split("_")[2]
+            == "timestamp"
+        )
+        assert any(a.is_hidden for a in Experiment().heading._attributes.values())
+        assert not any(a.is_hidden for a in Experiment().heading.attributes.values())