how to select multiple values by check box filter

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how to get multi select values by check box filter. this is my domain model and I am using reference select widget  and when I click on reference select widget I have given this page with check-box filter    I am able to see check box but it’s not working and radio button are working but I need objects with check-box and when I select multiple checkboxes and click on save it should show on this page. so, can someone help me please.
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5 answers
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Kindly use ReferenceSetSelector widget

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need in horizontal values with comas, please help

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require in horizontal values with comas and getting error when I am closing

 

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The error is occuring because you have one to many relation with the entiy where the values are stored, it needs to be many-many. 

Regarding the display horizontal separated by commas, this can’t be done  with this widget

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I have changed to many-many relationship, but still I am facing same error.

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