addresses review comments

lib/controllers/environment.py

@@ -70,7 +70,8 @@ async def create_env(self) -> Union[EnvCreated, HTTPException]:
             views.EnvCreated
         """
         try:
-            with EnvRepository.fetch_env(self.env) as env_repo:
+            with EnvRepository() as env_repo:
+                env_repo.fetch_env(self.env)
                 await env_repo.create_env()
         except Exception as e:
             exc_str = parse_error(e)
@@ -179,7 +180,8 @@ async def update_env_by_id(
             HTTP 404 Not Found: If the env is not found in the database.
         """
         try:
-            with EnvRepository.fetch_env(self.env) as env_repo:
+            with EnvRepository() as env_repo:
+                env_repo.fetch_env_by_id(env_id)
                 await env_repo.create_env()
                 await env_repo.delete_env_by_id(env_id)
         except Exception as e:

lib/controllers/flight.py

@@ -107,7 +107,8 @@ async def create_flight(self) -> Union[FlightCreated, HTTPException]:
             views.FlightCreated
         """
         try:
-            with FlightRepository.fetch_flight(self.flight) as flight_repo:
+            with FlightRepository() as flight_repo:
+                flight_repo.fetch_flight(self.flight)
                 await flight_repo.create_flight(
                     motor_kind=self.motor_kind,
                     rocket_option=self.rocket_option,
@@ -219,7 +220,8 @@ async def update_flight_by_id(
             HTTP 404 Not Found: If the flight is not found in the database.
         """
         try:
-            with FlightRepository.fetch_flight(self.flight) as flight_repo:
+            with FlightRepository() as flight_repo:
+                flight_repo.fetch_flight(self.flight)
                 await flight_repo.create_flight(
                     motor_kind=self.motor_kind,
                     rocket_option=self.rocket_option,
@@ -261,7 +263,8 @@ async def update_env_by_flight_id(
             new_flight = read_flight.dict()
             new_flight["environment"] = env
             new_flight = Flight(**new_flight)
-            with FlightRepository.fetch_flight(new_flight) as flight_repo:
+            with FlightRepository() as flight_repo:
+                flight_repo.fetch_flight(new_flight)
                 await flight_repo.create_flight(
                     motor_kind=read_flight.rocket.motor.motor_kind,
                     rocket_option=read_flight.rocket.rocket_option,
@@ -308,7 +311,8 @@ async def update_rocket_by_flight_id(
             new_flight = read_flight.dict()
             new_flight["rocket"] = updated_rocket
             new_flight = Flight(**new_flight)
-            with FlightRepository.fetch_flight(new_flight) as flight_repo:
+            with FlightRepository() as flight_repo:
+                flight_repo.fetch_flight(new_flight)
                 await flight_repo.create_flight(
                     motor_kind=motor_kind, rocket_option=rocket_option
                 )

lib/controllers/motor.py

@@ -118,7 +118,8 @@ async def create_motor(self) -> Union[MotorCreated, HTTPException]:
             views.MotorCreated
         """
         try:
-            with MotorRepository.fetch_motor(self.motor) as motor_repo:
+            with MotorRepository() as motor_repo:
+                motor_repo.fetch_motor(self.motor)
                 await motor_repo.create_motor(motor_kind=self.motor_kind)
         except Exception as e:
             exc_str = parse_error(e)
@@ -227,7 +228,8 @@ async def update_motor_by_id(
             HTTP 404 Not Found: If the motor is not found in the database.
         """
         try:
-            with MotorRepository.fetch_motor(self.motor) as motor_repo:
+            with MotorRepository() as motor_repo:
+                motor_repo.fetch_motor(self.motor)
                 await motor_repo.create_motor(motor_kind=self.motor_kind)
                 await motor_repo.delete_motor_by_id(motor_id)
         except Exception as e:

lib/controllers/rocket.py

@@ -155,7 +155,8 @@ async def create_rocket(self) -> Union[RocketCreated, HTTPException]:
             views.RocketCreated
         """
         try:
-            with RocketRepository.fetch_rocket(self.rocket) as rocket_repo:
+            with RocketRepository() as rocket_repo:
+                rocket_repo.fetch_rocket(self.rocket)
                 await rocket_repo.create_rocket(
                     rocket_option=self.rocket_option,
                     motor_kind=self.motor_kind,
@@ -268,7 +269,8 @@ async def update_rocket_by_id(
             HTTP 404 Not Found: If the rocket is not found in the database.
         """
         try:
-            with RocketRepository.fetch_rocket(self.rocket) as rocket_repo:
+            with RocketRepository() as rocket_repo:
+                rocket_repo.fetch_rocket(self.rocket)
                 await rocket_repo.create_rocket(
                     rocket_option=self.rocket_option,
                     motor_kind=self.motor_kind,

lib/repositories/environment.py

@@ -20,12 +20,10 @@ def __init__(self):
         super().__init__("environments")
         self._env = None
 
-    @classmethod
-    def fetch_env(cls, environment: Env):
-        instance = cls()
-        instance.env = environment
-        instance.env_id = environment.env_id
-        return instance
+    def fetch_env(self, environment: Env):
+        self.env = environment
+        self.env_id = environment.env_id
+        return self
 
     @property
     def env(self) -> Env:

lib/repositories/flight.py

@@ -20,12 +20,10 @@ def __init__(self):
         super().__init__("flights")
         self._flight = None
 
-    @classmethod
-    def fetch_flight(cls, flight: Flight):
-        instance = cls()
-        instance.flight = flight
-        instance.flight_id = flight.flight_id
-        return instance
+    def fetch_flight(self, flight: Flight):
+        self.flight = flight
+        self.flight_id = flight.flight_id
+        return self
 
     @property
     def flight(self) -> Flight:

lib/repositories/motor.py

@@ -20,12 +20,10 @@ def __init__(self):
         super().__init__("motors")
         self._motor = None
 
-    @classmethod
-    def fetch_motor(cls, motor: Motor):
-        instance = cls()
-        instance.motor = motor
-        instance.motor_id = motor.motor_id
-        return instance
+    def fetch_motor(self, motor: Motor):
+        self.motor = motor
+        self.motor_id = motor.motor_id
+        return self
 
     @property
     def motor(self) -> Motor:

lib/repositories/rocket.py

@@ -18,13 +18,12 @@ class RocketRepository(Repository):
 
     def __init__(self):
         super().__init__("rockets")
+        self._rocket = None
 
-    @classmethod
-    def fetch_rocket(cls, rocket: Rocket):
-        instance = cls()
-        instance.rocket = rocket
-        instance.rocket_id = rocket.rocket_id
-        return instance
+    def fetch_rocket(self, rocket: Rocket):
+        self.rocket = rocket
+        self.rocket_id = rocket.rocket_id
+        return self
 
     @property
     def rocket(self) -> Rocket: