initial commit

back/app/entity/models.py

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+from enum import Enum
+from datetime import datetime
+from pydantic import Field
+
+from beanie import Document
+
+
+class EntityType(str, Enum):
+    individual = 'individual'
+    corporation = 'corporation'
+    institution = 'institution'
+
+
+class Entity(Document):
+    _id: str
+    type: EntityType
+    name: str
+    address: str
+    created_at: datetime = Field(default=datetime.utcnow(), nullable=False)
+    updated_at: datetime = Field(default_factory=datetime.utcnow, nullable=False)