Added docs for cpl.database

src/cpl/database/connection/database_connection_abc.py

@@ -19,9 +19,11 @@ class DatabaseConnectionABC(ABC):
 
     @abstractmethod
     def connect(self, connection_string: str):
-        """
-        Connects to a database by connection string
-        :param connection_string:
-        :return:
+        r"""Connects to a database by connection string
+
+        Parameter
+        ---------
+            connection_string: :class:`str`
+                Database connection string, see: https://docs.sqlalchemy.org/en/14/core/engines.html
         """
         pass

src/cpl/database/context/database_context_abc.py

@@ -20,23 +20,20 @@ class DatabaseContextABC(ABC):
 
     @abstractmethod
     def connect(self, connection_string: str):
-        """
-        Connects to a database with connection string
-        :param connection_string:
-        :return:
+        r"""Connects to a database by connection string
+
+        Parameter
+        ---------
+            connection_string: :class:`str`
+                Database connection string, see: https://docs.sqlalchemy.org/en/14/core/engines.html
         """
         pass
 
     def save_changes(self):
-        """
-        Saves changes of the database
-        """
+        r"""Saves changes of the database"""
         pass
 
     @abstractmethod
     def _create_tables(self):
-        """
-        Create all tables for application from database model
-        :return:
-        """
+        r"""Create all tables for application from database model"""
         pass

src/cpl/database/database_settings.py

@@ -68,6 +68,12 @@ class DatabaseSettings(ConfigurationModelABC):
         self._echo = echo
 
     def from_dict(self, settings: dict):
+        r"""Sets attributes from given dict
+
+        Parameter
+        ---------
+        settings: :class:`dict`
+        """
         try:
             self._connection_string = settings[DatabaseSettingsNameEnum.connection_string.value]
             self._credentials = settings[DatabaseSettingsNameEnum.credentials.value]