galak75 opened a new pull request #4292: [AIRFLOW-2508] Handle non string types in Operators templatized fields URL: https://github.com/apache/incubator-airflow/pull/4292 ### Jira This PR addresses [[AIRFLOW-2508] Handle non string types in render_template_from_field](https://issues.apache.org/jira/browse/AIRFLOW-2508) ### Description This PR changes `BaseOperator.render_template_from_field` method behavior: - it was previously rendering `string_types` and supporting `Number`s (and collections or dictionaries of these types); but it was raising an `AirflowException` on any other type. - it is now supporting any other type (by returning the value as is) ### Tests This PR adds the following unit tests on `BaseOperator.render_template_from_field` method: - rendering a list of strings - rendering a tuple of strings - rendering dictionary values - showing dictionary keys are not templatized - returning a `date` as is - returning a `datetime` as is - returning a `UUID` as is - returning an `object` as is ### Notice **This PR adds [pyhamcrest](http://hamcrest.org/) to Airflow _test dependencies_.** This module helps writing meaningful assertions, and also provides very clear and helpful messages on test failures. If Airflow maintainers do not want to include this test module, just let me know, and I'll rework unit tests
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