[16.0] Fix inheritance of server env techname mixin

server_environment/models/server_env_tech_name_mixin.py

@@ -16,17 +16,18 @@ class ServerEnvTechNameMixin(models.AbstractModel):
     This mixin helps solve the problem by providing a tech name field
     and a cleanup machinery as well as a unique constrain.
 
-    To use this mixin add it to the _inherit attr of your module like:
+    To use this mixin add it to the _inherit attr of your model like:
+    (instead of `server.env.mixin`)
 
         _inherit = [
             "my.model",
             "server.env.techname.mixin",
-            "server.env.mixin",
         ]
 
     """
 
     _name = "server.env.techname.mixin"
+    _inherit = "server.env.mixin"
     _description = "Server environment technical name"
     _sql_constraints = [
         (

server_environment/readme/CONFIGURE.rst

@@ -96,4 +96,5 @@ Server environment integration
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Read the documentation of the class `models/server_env_mixin.py
-<models/server_env_mixin.py>`_.
+<models/server_env_mixin.py>`_ and `models/server_env_tech_name_mixin.py
+<models/server_env_tech_name_mixin.py>`_

server_environment/readme/USAGE.rst

@@ -19,6 +19,6 @@ If you want to have a technical name to reference::
 
     class StorageBackend(models.Model):
         _name = "storage.backend"
-        _inherit = ["storage.backend", "server.env.techname.mixin", "server.env.mixin"]
+        _inherit = ["storage.backend", "server.env.techname.mixin"]
 
         [...]