CE6811--when i try to use image loader widget

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Dear guys,           I am a new learner, when i use image loader widget, there is a error , but i don’t know how to fix it. is there any example, i can learn from?
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3 answers
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Can you please share the message of the error?

And describe what you are doing?

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thanks for the fast response, CE6881 is an image uolader must be placed inside a data view or snippet connected to entity”system. image’ or a specalization. i just want to use this widget, and i do place it in a data view. 

 

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Indeed as Rom indicates, the image uploader only works directly with a (specialization of) Image Entity.

Best way for now is to generalize the Teacher entity by the image entity

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