hughhhh commented on a change in pull request #4914: [WiP] make MetricsControl
the standard across visualizations
URL:
https://github.com/apache/incubator-superset/pull/4914#discussion_r186552155
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File path: superset/viz.py
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@@ -202,7 +222,7 @@ def query_obj(self):
"""Building a query object"""
form_data = self.form_data
gb = form_data.get('groupby') or []
- metrics = form_data.get('metrics') or []
+ metrics = self.all_metrics or []
Review comment:
I don't like the pattern we currently have for returning empty arrays, i
feel like we should be throwing some exceptions with the proper messaging to
let the user know how that there are no metrics currently selected.
For instance if we get `len(self.all_metrics) == 0` or some check we should
throw a `SupersetException`
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