Add ref property for string output.

src/aaz_dev/cli/controller/az_output_generator.py

@@ -9,7 +9,7 @@ def __init__(self, output, cmd_ctx):
 
     @property
     def ref(self):
-        if isinstance(self._output, (CMDObjectOutput, CMDArrayOutput)) and self._output.ref:
+        if isinstance(self._output, (CMDObjectOutput, CMDArrayOutput, CMDStringOutput)) and self._output.ref:
             ref, is_selector = self._cmd_ctx.get_variant(self._output.ref)
             if is_selector:
                 return f'{ref}.required()'
@@ -29,6 +29,8 @@ def next_link(self):
     def client_flatten(self):
         if isinstance(self._output, (CMDObjectOutput, CMDArrayOutput)):
             return self._output.client_flatten is True
+        elif isinstance(self._output, CMDStringOutput):
+            return False
         else:
             raise NotImplementedError()
 

src/aaz_dev/command/model/configuration/_arg_builder.py

@@ -369,14 +369,12 @@ def get_type(self):
 
     def get_reverse_boolean(self):
         assert isinstance(self.schema, CMDBooleanSchemaBase)
-        if self._ref_arg:
-            assert isinstance(self._ref_arg, CMDBooleanArgBase)
+        if self._ref_arg and isinstance(self._ref_arg, CMDBooleanArgBase):
             return self._ref_arg.reverse
         return False
 
     def get_resource_location_no_rg_default(self):
         assert isinstance(self.schema, CMDResourceLocationSchemaBase)
-        if self._ref_arg:
-            assert isinstance(self._ref_arg, CMDResourceLocationArgBase)
+        if self._ref_arg and isinstance(self._ref_arg, CMDResourceLocationArgBase):
             return self._ref_arg.no_rg_default
         return False

src/aaz_dev/command/model/configuration/_output.py

@@ -64,4 +64,7 @@ class CMDArrayOutput(CMDOutput):
 class CMDStringOutput(CMDOutput):
     TYPE_VALUE = 'string'
 
-    value = StringType(required=True)
+    # ref means get value from content
+    ref = CMDVariantField()
+    # use placeholder value as output
+    value = StringType()