'returning just a key from a hash field
I have an ActivityPart model that has a field called activity_json. this field is a hash and has a key named "image". How do I select all "image" from the activity_json field? I did something like this but it didn't work:
x = ActivityPart.all.pluck(activity_json: ['image'])
my idea is to return all 'image' from the activiy_json field
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