Bug 1396634

Summary: 'SystemService' object has no attribute 'instance_type_service' in SDK
Product: Red Hat Enterprise Virtualization Manager Reporter: Robert McSwain <rmcswain>
Component: ovirt-engine-sdk-pythonAssignee: Ondra Machacek <omachace>
Status: CLOSED NOTABUG QA Contact: Pavel Stehlik <pstehlik>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 4.0.4CC: gklein
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Hardware: x86_64   
OS: Linux   
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Last Closed: 2016-11-21 08:48:48 UTC Type: Bug
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oVirt Team: Infra RHEL 7.3 requirements from Atomic Host:
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Description Robert McSwain 2016-11-18 19:03:53 UTC 
Description of problem:

"According to /ovirt-engine/api/model#services/instance_type
This service within the Python SDK should exist: connection.system_service().instance_types_service()
However I get: AttributeError: 'SystemService' object has no attribute 'instance_type_service' "

Perhaps I need to re-phrase my question as,
"How am I supposed to be able to add/update/remove an Instance Type in RHVM with python-ovirt-engine-sdk4?"

I tried this, but it's failing.  Error message below...

[root@drrhvm ~]# yum info python-ovirt-engine-sdk4
Loaded plugins: search-disabled-repos, versionlock
Installed Packages
Name        : python-ovirt-engine-sdk4
Arch        : x86_64
Version     : 4.0.1
Release     : 1.el7ev
Size        : 4.3 M
Repo        : installed
From repo   : rhel-7-server-rhv-4.0-rpms
Summary     : Python SDK for version 4 of the oVirt Engine API
URL         : http://ovirt.org/wiki/SDK
License     : ASL 2.0
Description : This package contains the Python SDK for version 4 of the oVirt Engine
            : API.

Python:
import ovirtsdk4 as sdk
import ovirtsdk4.types as types
connection =
sdk.Connection(url='https://drrhvm.capella.edu/ovirt-engine/api',username='
admin@internal',password='**********************',insecure=True,debug=False
)

test = connection.system_service().instance_type_service()
# RETURNS: --- AttributeError: 'SystemService' object has no attribute 'instance_type_service'

Version-Release number of selected component (if applicable):
RHEV 4.0.4

How reproducible:
100% 

Actual results:
Errors out due to the error 
AttributeError: 'SystemService' object has no attribute 'instance_type_service'

Expected results:
Succeeds
Comment 1 Ondra Machacek 2016-11-21 08:48:48 UTC 
In your output you refer to incorrect naming.
Usually the name of the service which manages the collections have plural names.
The services which manages specific entity use singular names. So check the following output:

# Get the reference to the instance types service:
instance_types_service = connection.system_service().instance_types_service()

# Use the "add" method to create a instance type:
instance_types_service.add(
    types.InstanceType(
        name='myinstancetype',
        description='My instance type',
    ),
)

# Find the instace type:
instance_type = instance_types_service.list()[0]

# Locate the service that manages the virtual machine, as that is where
# the action methods are defined:
instance_type_service = instance_types_service.instance_type_service(instance_type.id)

# Remove instance type:
instance_type_service.remove()

In your example, you've refered to 'instance_type_service', but it should be 'instance_types_service'. I've also created an full example here:

 https://gerrit.ovirt.org/#/c/67098/2/sdk/examples/add_instance_type.py