Create model_ifc_unit_relation.py

src/django-bim/models/ifc/unit/model_ifc_unit_relation.py

@@ -0,0 +1,79 @@
+# -*- coding: utf-8 -*-
+
+
+# =============================================================================
+# Docstring
+# =============================================================================
+
+"""
+Provides IFC ... Model Class
+===================================
+
+For more information, refer to:
+
+"""  # noqa E501
+
+
+# =============================================================================
+# Import
+# =============================================================================
+
+# Import | Standard Library
+
+# Import | Libraries
+from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+# Import | Local Modules
+from ...fields.model import (
+    IfcLabelField,
+    IfcRoleTypeField,
+    IfcTextField,
+)
+
+
+# =============================================================================
+# Classes
+# =============================================================================
+
+from django.db import models
+from django.contrib.contenttypes.fields import GenericRelation
+from django.contrib.contenttypes.models import ContentType
+from django.utils.translation import gettext_lazy as _
+
+class IfcUnitRelation(models.Model):
+    """
+    Model to facilitate a GenericRelation from IfcUnitAssignment to various IfcUnit models
+    """
+    object_id = models.PositiveIntegerField()
+    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
+    unit = GenericRelation('IfcUnit', related_query_name='unit_relations')
+
+    content_object = GenericForeignKey('content_type', 'object_id')
+
+    # Class | Model Meta Class
+    # =========================================================================
+
+    class Meta:
+        """
+        Meta Class
+        ----------
+
+        """
+
+    # Class | Model Methods
+    # =========================================================================
+
+    def __str__(self) -> str:
+        """
+        """
+        return f"{self.content_object}"
+
+
+# =============================================================================
+# Module Variables
+# =============================================================================
+
+__all__ = [
+    "IfcActorRoleModel",
+]