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some error handling for WordCloud
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@ -445,6 +445,9 @@ class WordCloudViz(BaseViz):
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def query_obj(self):
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d = super(WordCloudViz, self).query_obj()
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if len(d['groupby']) < 1:
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raise Exception("Pick at least one field to group by")
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metric = self.form_data.get('metric')
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if not metric:
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raise Exception("Pick a metric!")
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