fix: all django management command related subcommands

We just called `manage` inside docker instead of
`exec appserver python manage.py`. Now we make assumption that django
app is running in docker-compose in service named `appserver`.

While fixing this bug we also refactored for `shell`, `makemigrations`
and `migrate` to all call `manage` under the hood to avoid repeating code.

src/scripts/django.rs

@@ -46,28 +46,26 @@ pub fn make_command(app: &PathBuf, name: &str) -> Result<()> {
     Ok(())
 }
 
-pub fn makemigrations() -> Result<()> {
-    let dsm = get_django_settings_module()?;
-    let command = format!("manage makemigrations --settings={dsm}");
-    DockerCommand::docker_compose().args(&command).spawn_wait()
-}
-
 pub fn manage(rest: &[String]) -> Result<()> {
     let dsm = get_django_settings_module()?;
     let joined = rest.join(" ");
-    let command = format!("manage {joined} --settings={dsm}");
+    let command = format!("exec appserver python manage.py {joined} --settings={dsm}");
     DockerCommand::docker_compose().args(&command).spawn_wait()
 }
 
-pub fn migrate(rest: &[String]) -> Result<()> {
+// shortcuts
-    let dsm = get_django_settings_module()?;
+pub fn makemigrations() -> Result<()> {
-    let joined = rest.join(" ");
+    manage(&["makemigrations".to_string()])
-    let command = format!("manage migrate {joined} --settings={dsm}");
-    DockerCommand::docker_compose().args(&command).spawn_wait()
 }
 
 pub fn shell() -> Result<()> {
-    let dsm = get_django_settings_module()?;
+    manage(&["shell".to_string()])
-    let command = format!("manage shell --settings={dsm}");
-    DockerCommand::docker_compose().args(&command).spawn_wait()
 }
+
+pub fn migrate(rest: &[String]) -> Result<()> {
+    let mut full_rest = vec!["migrate".to_string()];
+    full_rest.extend_from_slice(rest);
+
+    manage(&full_rest)
+}
+