diff --git a/labertasche/database/__init__.py b/labertasche/database/__init__.py
index 929b1da..c257476 100644
--- a/labertasche/database/__init__.py
+++ b/labertasche/database/__init__.py
@@ -7,6 +7,17 @@
 #  * _license : This project is under MIT License
 #  *********************************************************************************/
 from flask_sqlalchemy import SQLAlchemy
+from sqlalchemy import MetaData
+
+# naming conventions
+convention = {
+    "ix": 'ix_%(column_0_label)s',
+    "uq": "uq_%(table_name)s_%(column_0_name)s",
+    "ck": "ck_%(table_name)s_%(constraint_name)s",
+    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
+    "pk": "pk_%(table_name)s"
+}
+metadata = MetaData(naming_convention=convention)
 
 # Create SQLAlchemy
-labertasche_db = SQLAlchemy()
+labertasche_db = SQLAlchemy(metadata=metadata)
diff --git a/labertasche/models/__init__.py b/labertasche/models/__init__.py
index 6614d81..7e9bc2c 100644
--- a/labertasche/models/__init__.py
+++ b/labertasche/models/__init__.py
@@ -9,3 +9,4 @@
 from .t_comments import TComments
 from .t_location import TLocation
 from .t_emails import TEmail
+from .t_projects import TProjects
diff --git a/labertasche/models/t_comments.py b/labertasche/models/t_comments.py
index e2a23a1..d97f86e 100644
--- a/labertasche/models/t_comments.py
+++ b/labertasche/models/t_comments.py
@@ -28,7 +28,8 @@ class TComments(db.Model):
     is_published = db.Column(db.Boolean, nullable=False)
     is_spam = db.Column(db.Boolean, nullable=False)
     spam_score = db.Column(db.Float, nullable=False)
-    replied_to = db.Column(db.Integer, ForeignKey('t_comments.comments_id'), nullable=True)
+    replied_to = db.Column(db.Integer, ForeignKey('t_comments.comments_id'), nullable=True, default=None)
     confirmation = db.Column(db.Text, nullable=True)
     deletion = db.Column(db.Text, nullable=True)
     gravatar = db.Column(db.Text, nullable=True)
+    project_id = db.Column(db.Integer, ForeignKey('t_projects.id_project'), nullable=False)
diff --git a/labertasche/models/t_emails.py b/labertasche/models/t_emails.py
index 49e90c3..91746dc 100644
--- a/labertasche/models/t_emails.py
+++ b/labertasche/models/t_emails.py
@@ -7,6 +7,7 @@
 #  * _license : This project is under MIT License
 #  *********************************************************************************/
 from labertasche.database import labertasche_db as db
+from sqlalchemy import ForeignKey
 
 
 class TEmail(db.Model):
@@ -21,3 +22,4 @@ class TEmail(db.Model):
     email = db.Column(db.Integer, unique=True)
     is_blocked = db.Column(db.Boolean)
     is_allowed = db.Column(db.Boolean)
+    project_id = db.Column(db.Integer, ForeignKey('t_projects.id_project'), nullable=False)
diff --git a/labertasche/models/t_location.py b/labertasche/models/t_location.py
index 9203156..8e469c4 100644
--- a/labertasche/models/t_location.py
+++ b/labertasche/models/t_location.py
@@ -7,6 +7,7 @@
 #  * _license : This project is under MIT License
 #  *********************************************************************************/
 from labertasche.database import labertasche_db as db
+from sqlalchemy import ForeignKey
 
 
 class TLocation(db.Model):
@@ -19,3 +20,4 @@ class TLocation(db.Model):
 
     # data
     location = db.Column(db.Text, nullable=False, unique=True)
+    project_id = db.Column(db.Integer, ForeignKey('t_projects.id_project'), nullable=False)
diff --git a/labertasche/models/t_projects.py b/labertasche/models/t_projects.py
new file mode 100644
index 0000000..b61c300
--- /dev/null
+++ b/labertasche/models/t_projects.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# /**********************************************************************************
+#  * _author  : Domeniko Gentner
+#  * _mail    : code@tuxstash.de
+#  * _repo    : https://git.tuxstash.de/gothseidank/labertasche
+#  * _license : This project is under MIT License
+#  *********************************************************************************/
+from labertasche.database import labertasche_db as db
+
+
+class TProjects(db.Model):
+    # table name
+    __tablename__ = "t_projects"
+    __table_args__ = {'useexisting': True}
+
+    # primary key
+    id_project = db.Column(db.Integer, primary_key=True)
+
+    # data
+    name = db.Column(db.Text, nullable=True, unique=True)
diff --git a/server.py b/server.py
index 09c9d79..812d867 100644
--- a/server.py
+++ b/server.py
@@ -34,9 +34,15 @@ laberflask.config.update(dict(
     SQLALCHEMY_TRACK_MODIFICATIONS=False
 ))
 
-# flask migrate
+# Flask migrate
+
 migrate = Migrate(laberflask, labertasche_db, render_as_batch=True)
 
+# Initialize ORM
+labertasche_db.init_app(laberflask)
+with laberflask.app_context():
+    labertasche_db.create_all()
+
 # CORS
 CORS(laberflask, resources={r"/comments": {"origins": settings.system['blog_url']}})
 
@@ -49,10 +55,6 @@ laberflask.register_blueprint(bp_login)
 log = logging.getLogger('werkzeug')
 log.setLevel(logging.ERROR)
 
-# Initialize ORM
-labertasche_db.init_app(laberflask)
-with laberflask.app_context():
-    labertasche_db.create_all()
 
 # Set up login manager
 loginmgr = LoginManager(laberflask)