Template for Operator' Json Argument

[ra...@gmail.com, ra...@gmail.com]

Hi All,

We have implemented a custom operator which is derived from baseOperator. Custom operator takes a JSON argument. Some fields of this Json are string and others are integer. We need to templatised the string fields only and not integer. But on doing this we are getting the error airflow.exceptions.AirflowException: Type '<type 'int'>' used for parameter 'json[number]' is not supported for templating.

So is this possible to have both string and integer in templatised field.

Thanks,
Raman Gupta

Re: Template for Operator' Json Argument

[Taylor Edmiston <te...@gmail.com>]

I think you need to convert any non-str type into a string to render it in
the template, i.e., just str(foo).

https://github.com/apache/incubator-airflow/blob/1d3bb5470711a935b36b6a0ab4c7ec414d460d75/airflow/models.py#L2613

But in your template, if I understand correctly that you're building a JSON
object as a string you could render that particular field without quotes
wrapping it, so a JSON parser would detect it as an int, not a str.  Does
that make sense?

Can you share your code?

Best,
Taylor

On Sat, May 5, 2018 at 4:42 AM ramandumcs@gmail.com <ra...@gmail.com>
wrote:

> Hi All,
>
> We have implemented a custom operator which is derived from baseOperator.
> Custom operator takes a JSON argument. Some fields of this Json are string
> and others are integer. We need to templatised the string fields only and
> not integer. But on doing this we are getting the error
> airflow.exceptions.AirflowException: Type '<type 'int'>' used for parameter
> 'json[number]' is not supported for templating.
>
> So is this possible to have both string and integer in templatised field.
>
> Thanks,
> Raman Gupta
>
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