Codegen: implement db_table_name in rustgen

Author: Paolo Tranquilli

misc/codegen/generators/rustgen.py

@@ -27,22 +27,28 @@ def _get_type(t: str) -> str:
             return t
 
 
+def _get_table_name(cls: schema.Class, p: schema.Property) -> str:
+    if p.is_single:
+        return inflection.tableize(cls.name)
+    overridden_table_name = p.pragmas.get("ql_db_table_name")
+    if overridden_table_name:
+        return overridden_table_name
+    table_name = f"{cls.name}_{p.name}"
+    if p.is_predicate:
+        return inflection.underscore(table_name)
+    else:
+        return inflection.tableize(table_name)
+
+
 def _get_field(cls: schema.Class, p: schema.Property) -> rust.Field:
-    table_name = inflection.tableize(cls.name)
-    if not p.is_single:
-        table_name = f"{cls.name}_{p.name}"
-        if p.is_predicate:
-            table_name = inflection.underscore(table_name)
-        else:
-            table_name = inflection.tableize(table_name)
     args = dict(
         field_name=rust.avoid_keywords(p.name),
         base_type=_get_type(p.type),
         is_optional=p.is_optional,
         is_repeated=p.is_repeated,
         is_predicate=p.is_predicate,
         is_unordered=p.is_unordered,
-        table_name=table_name,
+        table_name=_get_table_name(cls, p),
     )
     args.update(rust.get_field_override(p.name))
     return rust.Field(**args)