feat: import/export dashboards via cli

[arpit-agarwal]

This PR will add back changes of #5991 that were reverted by #6035. This PR will close #5821

The travis configuration changes resolved the postgres test stuck issue

@graceguo-supercat We can attach details of travis change as well for future reference.

[kristw]

@arpit-agarwal Is this rebased on top of current master?

[arpit-agarwal]

@kristw Yes

However I see it is behind by 1 commit now due to latest commit of @graceguo-supercat .

[arpit-agarwal]

@graceguo-supercat / @kristw

I am not sure why this is failing for postgres when exactly same test works for other db.

I think it is best to mock the db operations in this test as this code is written on top of existing functionality that is well tested.

I am removing tests for now and will raise a new PR with only tests.

let me know what you guys think?

[codecov-io]

Codecov Report

Merging #6061 into master will decrease coverage by 0.22%.
The diff coverage is 31.03%.

@@            Coverage Diff             @@
##           master    #6061      +/-   ##
==========================================
- Coverage   77.81%   77.59%   -0.23%     
==========================================
  Files          46       47       +1     
  Lines        9446     9496      +50     
==========================================
+ Hits         7350     7368      +18     
- Misses       2096     2128      +32

Impacted Files	Coverage Δ
superset/views/core.py	74.19% <0%> (+0.36%)	⬆️
superset/cli.py	50% <23.33%> (-3.61%)	⬇️
superset/dashboard_import_export_util.py	40.74% <40.74%> (ø)

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[graceguo-supercat]

here is failed build, just for reference in the future:
https://travis-ci.org/apache/incubator-superset/jobs/439235984

if you follow the stack trace, it goes from assert_dash_equals => compare slice one by one => viz_type not match. Before we compare slices one by one, we sort slice by name. But i hit into a few times that a slice doesn't have a name, so handle it as ''. Is it possible that you also hit into cases that multiple slices don't have name, and cause slice comparison failed?

I am ok to merge this PR. but when you add unit test in new PR, please pay attention to this scenario.

[graceguo-supercat]

LGTM

[arpit-agarwal]

Thanks @graceguo-supercat .
I am doing comparisons by id to avoid the confliclt.
I am exporting the dashboards already present in db so they should ideally match.

I am not sure why they will differ unless some other parallel execution modif the slices transitively
I will investigate further and raise the PR.

[HimanshuArora1234]

Hello Just wanted to know if this feature has already been released ? if so then in which version of superset ? Thanks a lot. Keep doing the great work :)

Cheers,
Himanshu

[arpit-agarwal]

This is released in 0.28

[arslanselcuk]

Hi everyone ,

I need exported dashboards to be imported to another environment from command line to deploy dashboards on DTAP street.

Is it possible to see an implementation of this feature? Somehow I could not find it, or maybe I could not understand how to use it.
Regards.

[ITNoesis]

Hello All,
Can someone give me an example of how to export and import a dashboard via commandline?

[ITNoesis]

Hello All,
Can someone give me an example of how to export and import a dashboard via commandline?

Guess I am answering my own question:

Export dashboards from containerized install of SuperSet:

-- Login to docker container running superset app:
docker exec -it --user=username superset_app bash

-- Export dashboards:
$pwd
/app
$superset export_dashboards -f filename_and_path
--Example:
$superset export_dashboards -f /app/test_exportdashboards.json

-- Copy the dashboard to localhost
docker cp superset_app:/app/test_exportdashboards.json /devtools/superset/dashboards

This however, will download all the dashboards and I did not see an option to download a specific one.
The only available options are:

/app$ superset export-dashboards --help
Loaded your LOCAL configuration at [/app/pythonpath/superset_config.py]
INFO:superset.utils.logging_configurator:logging was configured successfully
/usr/local/lib/python3.6/site-packages/flask_caching/init.py:189: UserWarning: Flask-Caching: CACHE_TYPE is set to null, caching is effectively disabled.
"Flask-Caching: CACHE_TYPE is set to null, "
Usage: superset export-dashboards [OPTIONS]

Export dashboards to JSON

Options:
-f, --dashboard-file TEXT Specify the the file to export to
-p, --print_stdout Print JSON to stdout
--help Show this message and exit.

Regards,
Arun