Add support for pgvector (#1675)

mem0/configs/vector_stores/pgvector.py

@@ -0,0 +1,34 @@
+from typing import Optional, Dict, Any
+
+from pydantic import BaseModel, Field, model_validator
+
+class PGVectorConfig(BaseModel):
+
+    dbname: str = Field("postgres", description="Default name for the database")
+    collection_name: str = Field("mem0", description="Default name for the collection")
+    embedding_model_dims: Optional[int] = Field(1536, description="Dimensions of the embedding model")
+    user: Optional[str] = Field(None, description="Database user")
+    password: Optional[str] = Field(None, description="Database password")
+    host: Optional[str] = Field(None, description="Database host. Default is localhost")
+    port: Optional[int] = Field(None, description="Database port. Default is 1536")
+
+    @model_validator(mode="before")
+    def check_auth_and_connection(cls, values):
+        user, password = values.get("user"), values.get("password")
+        host, port = values.get("host"), values.get("port")
+        if not user and not password:
+            raise ValueError("Both 'user' and 'password' must be provided.")
+        if not host and not port:
+            raise ValueError("Both 'host' and 'port' must be provided.")
+        return values
+    
+    @model_validator(mode="before")
+    @classmethod
+    def validate_extra_fields(cls, values: Dict[str, Any]) -> Dict[str, Any]:
+        allowed_fields = set(cls.model_fields.keys())
+        input_fields = set(values.keys())
+        extra_fields = input_fields - allowed_fields
+        if extra_fields:
+            raise ValueError(f"Extra fields not allowed: {', '.join(extra_fields)}. Please input only the following fields: {', '.join(allowed_fields)}")
+        return values
+