Fixed improperly nested engine_config arguments in PG DB creation

Author: ezilber-akamai

linodecli/api_request.py

@@ -359,11 +359,30 @@ def _build_request_body(
 
     expanded_json = {}
 
-    # Expand dotted keys into nested dictionaries
+    # Keys under `engine_config.pg` that should stay flat at one level deep
+    flat_pg_keys = {
+        "pg_partman_bgw.interval",
+        "pg_partman_bgw.role",
+        "pg_stat_monitor.pgsm_enable_query_plan",
+        "pg_stat_monitor.pgsm_max_buckets",
+        "pg_stat_statements.track",
+    }
+
     for k, v in vars(parsed_args).items():
         if v is None or k in param_names:
             continue
 
+        # If the key starts with the prefix "engine_config.pg" and is one
+        # of the keys to remain flat, do not nest
+        if k.startswith("engine_config.pg."):
+            remainder = k[len("engine_config.pg.") :]
+            if remainder in flat_pg_keys:
+                expanded_json.setdefault("engine_config", {}).setdefault(
+                    "pg", {}
+                )[remainder] = v
+                continue
+
+        # Expand dotted keys into nested dictionaries (default)
         cur = expanded_json
         for part in k.split(".")[:-1]:
             if part not in cur: