[jira] [Resolved] (AIRFLOW-4265) Lineage backend did not work normally

["Tao Feng (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AIRFLOW-4265?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tao Feng resolved AIRFLOW-4265.
-------------------------------
       Resolution: Fixed
    Fix Version/s: 2.0.0

> Lineage backend did not work normally
> -------------------------------------
>
>                 Key: AIRFLOW-4265
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-4265
>             Project: Apache Airflow
>          Issue Type: Bug
>            Reporter: Bryan Yang
>            Assignee: Bryan Yang
>            Priority: Major
>             Fix For: 2.0.0
>
>
> 1. Lineage backend comes from {{import_string}} function, and {{import_string}} will try to seperate module_path and class_name by dot.
> {quote}def import_string(dotted_path):
>  """
>  Import a dotted module path and return the attribute/class designated by the
>  last name in the path. Raise ImportError if the import failed.
>  """
>  try:
>  module_path, class_name = dotted_path.rsplit('.', 1)
>  except ValueError:
>  raise ImportError("{} doesn't look like a module path".format(dotted_path))
> module = import_module(module_path)
> {quote}
> But in the current document: {{backend = airflow.lineage.backend.atlas}} which is just a module path without class name \{{AtlasBackend}}.
> 2. Continuously, this function will return a module or class instead of an instance. So that when {{apply_lineage}} want to call {{backend.send_lineage}}, it will fail.



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