Update Document domain models to use pgvector (extension of PostgreSQL)

eveai_app/models/document.py

@@ -1,5 +1,6 @@
 from ..extensions import db
 from .user import User, Tenant
+from pgvector.sqlalchemy import Vector
 
 
 class Document(db.Model):
@@ -15,6 +16,12 @@ class Document(db.Model):
     updated_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now(), onupdate=db.func.now())
     updated_by = db.Column(db.Integer, db.ForeignKey(User.id))
 
+    # Relations
+    languages = db.relationship('DocumentLanguage', backref='document', lazy=True)
+
+    def __repr__(self):
+        return f"<Document {self.id}: {self.name}>"
+
 
 class DocumentLanguage(db.Model):
     id = db.Column(db.Integer, primary_key=True)
@@ -24,15 +31,48 @@ class DocumentLanguage(db.Model):
     # Versioning Information
     created_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now())
     created_by = db.Column(db.Integer, db.ForeignKey(User.id), nullable=False)
+    updated_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now(), onupdate=db.func.now())
+    updated_by = db.Column(db.Integer, db.ForeignKey(User.id))
+
+    # Relations
+    versions = db.relationship('DocumentVersion', backref='document_language', lazy=True)
+
+    def __repr__(self):
+        return f"<DocumentLanguage {self.document_id}.{self.language}>"
 
 
 class DocumentVersion(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     doc_lang_id = db.Column(db.Integer, db.ForeignKey(DocumentLanguage.id), nullable=False)
     url = db.Column(db.String(200), nullable=True)
-    embeddings = db.Column(db.PickleType, nullable=True)
+    file_location = db.Column(db.String(255), nullable=True)
+    file_name = db.Column(db.String(200), nullable=True)
+    file_type = db.Column(db.String(20), nullable=True)
 
     # Versioning Information
     created_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now())
     created_by = db.Column(db.Integer, db.ForeignKey(User.id))
+    updated_at = db.Column(db.DateTime, nullable=False, server_default=db.func.now(), onupdate=db.func.now())
+    updated_by = db.Column(db.Integer, db.ForeignKey(User.id))
 
+    # Relations
+    embeddings = db.relationship('EmbeddingMistral', backref='document_version', lazy=True)
+
+    def __repr__(self):
+        return f"<DocumentVersion {self.document_language.document_id}.{self.document_language.language}>.{self.id}>"
+
+    def calc_file_location(self):
+        return f"{self.document_language.document.tenant.id}/{self.document_language.document.id}/{self.document_language.language}"
+
+    def calc_file_name(self):
+        return f"{self.id}.{self.file_type}"
+
+
+class EmbeddingMistral(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    doc_vers_id = db.Column(db.Integer, db.ForeignKey(DocumentVersion.id), nullable=False)
+    active = db.Column(db.Boolean, nullable=False, default=True)
+
+    # 1024 is the MISTRAL Embedding dimension.
+    # If another embedding model is chosen, this dimension may need to be changed.
+    embedding = db.Column(Vector(1024), nullable=False)

migrations/tenant/env.py

@@ -8,6 +8,9 @@ from sqlalchemy import NullPool, engine_from_config, text
 
 from eveai_app.models.user import Tenant
 
+import pgvector
+from pgvector.sqlalchemy import Vector
+
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.

requirements.txt

@@ -3,3 +3,4 @@ WTForms~=3.1.2
 SQLAlchemy~=2.0.29
 alembic~=1.13.1
 Werkzeug~=3.0.2
+pgvector~=0.2.5