feat: improve error handling in HTTP requests and database fixture loading

entrypoint.sh

@@ -16,16 +16,35 @@ if [ ! -f "$DB_PATH" ] && [ -f "$LEGACY_DB_PATH" ]; then
   cp "$LEGACY_DB_PATH" "$DB_PATH"
 fi
 
-if [ ! -f "$DB_PATH" ] && [ "${LOAD_FIXTURE_ON_EMPTY_DB:-true}" = "true" ]; then
-  python manage.py migrate
-  if [ -f "$DUMP_SRC" ]; then
-    TMP_DUMP="$(mktemp)"
-    python /app/scripts/rewrite_dumps.py "$DUMP_SRC" "$TMP_DUMP"
-    python manage.py loaddata "$TMP_DUMP"
-    rm -f "$TMP_DUMP"
+python manage.py migrate
+
+should_load_fixture=0
+if [ "${LOAD_FIXTURE_ON_EMPTY_DB:-true}" = "true" ] && [ -f "$DUMP_SRC" ]; then
+  if [ ! -s "$DB_PATH" ]; then
+    should_load_fixture=1
+  else
+    entity_conf_count="$(python manage.py shell -c '
+from django.db import connection
+table = "spid_cie_oidc_entity_federationentityconfiguration"
+with connection.cursor() as cursor:
+    tables = connection.introspection.table_names(cursor)
+    if table not in tables:
+        print(0)
+    else:
+        cursor.execute(f"SELECT COUNT(*) FROM {table}")
+        print(cursor.fetchone()[0])
+')"
+    if [ "${entity_conf_count:-0}" = "0" ]; then
+      should_load_fixture=1
+    fi
   fi
-else
-  python manage.py migrate
+fi
+
+if [ "$should_load_fixture" = "1" ]; then
+  TMP_DUMP="$(mktemp)"
+  python /app/scripts/rewrite_dumps.py "$DUMP_SRC" "$TMP_DUMP"
+  python manage.py loaddata "$TMP_DUMP"
+  rm -f "$TMP_DUMP"
 fi
 
 python /app/scripts/normalize_db_urls.py "$DB_PATH"