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setup_db.py
-----------
Run once to create all MongoDB collections, validators, and indexes
for the FactCheck AI project on Atlas.
Usage:
python setup_db.py
"""
import os
import sys
from dotenv import load_dotenv
from pymongo import MongoClient, ASCENDING, DESCENDING
from pymongo.errors import CollectionInvalid
load_dotenv()
MONGO_URI = os.getenv("MONGO_URI")
MONGO_DB = os.getenv("MONGO_DB_NAME", "factcheck")
if not MONGO_URI:
sys.exit("[ERROR] MONGO_URI not found in .env")
print(f"[DB] Connecting to Atlas … db={MONGO_DB}")
client = MongoClient(MONGO_URI, serverSelectionTimeoutMS=8000)
db = client[MONGO_DB]
# ── helper ──────────────────────────────────────────────────────────────────────
def create_or_update(name: str, validator: dict):
existing = db.list_collection_names()
if name not in existing:
db.create_collection(name, validator=validator)
print(f" [+] created '{name}'")
else:
db.command("collMod", name, validator=validator)
print(f" [~] updated '{name}' validator")
# ════════════════════════════════════════════════════════════════════════════════
# 1. users
# ════════════════════════════════════════════════════════════════════════════════
create_or_update("users", {
"$jsonSchema": {
"bsonType": "object",
"required": ["username", "email", "password_hash", "created_at"],
"properties": {
"username": {"bsonType": "string", "minLength": 1, "maxLength": 80},
"email": {"bsonType": "string", "minLength": 3, "maxLength": 254},
"password_hash": {"bsonType": "string"},
"created_at": {"bsonType": "date"},
}
}
})
db.users.create_index([("email", ASCENDING)], unique=True, background=True, name="email_unique")
db.users.create_index([("username", ASCENDING)], background=True, name="username_idx")
print(" indexes: email (unique), username")
# ════════════════════════════════════════════════════════════════════════════════
# 2. history
# ════════════════════════════════════════════════════════════════════════════════
create_or_update("history", {
"$jsonSchema": {
"bsonType": "object",
"required": ["user_id", "claim", "verdict", "confidence", "evidence_count", "created_at"],
"properties": {
"user_id": {"bsonType": "string"},
"claim": {"bsonType": "string", "minLength": 1},
"verdict": {"bsonType": "string"},
"confidence": {"bsonType": "double", "minimum": 0, "maximum": 1},
"evidence_count": {"bsonType": "int", "minimum": 0},
"created_at": {"bsonType": "date"},
}
}
})
db.history.create_index(
[("user_id", ASCENDING), ("created_at", DESCENDING)],
background=True, name="user_history_idx"
)
print(" indexes: user_id + created_at")
# ════════════════════════════════════════════════════════════════════════════════
# 3. evidence (TTL: auto-delete after 30 days)
# ════════════════════════════════════════════════════════════════════════════════
create_or_update("evidence", {
"$jsonSchema": {
"bsonType": "object",
"required": ["text", "source", "created_at"],
"properties": {
"text": {"bsonType": "string", "minLength": 1},
"source": {"bsonType": "string"},
"created_at": {"bsonType": "date"},
}
}
})
db.evidence.create_index(
[("created_at", ASCENDING)],
expireAfterSeconds=30 * 24 * 3600,
background=True, name="evidence_ttl"
)
db.evidence.create_index([("source", ASCENDING)], background=True, name="source_idx")
print(" indexes: created_at (TTL 30d), source")
# ════════════════════════════════════════════════════════════════════════════════
# 4. revoked_tokens (JWT blocklist, TTL = token exp)
# ════════════════════════════════════════════════════════════════════════════════
create_or_update("revoked_tokens", {
"$jsonSchema": {
"bsonType": "object",
"required": ["jti", "exp", "revoked_at"],
"properties": {
"jti": {"bsonType": "string"},
"exp": {"bsonType": "date"},
"revoked_at": {"bsonType": "date"},
}
}
})
db.revoked_tokens.create_index(
[("exp", ASCENDING)],
expireAfterSeconds=0, # removed the moment exp is reached
background=True, name="token_ttl"
)
db.revoked_tokens.create_index([("jti", ASCENDING)], unique=True, background=True, name="jti_unique")
print(" indexes: exp (TTL), jti (unique)")
# ════════════════════════════════════════════════════════════════════════════════
print("\n[DB] All collections and indexes are ready on Atlas! OK")
client.close()
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