Modify multiple fields in form - CI4

PHP Code:

‘is_unique[categories.category_name.'.$this->request->getVar('category_name').']‘ 


Your is_unique rule is not correct. You should exclude the current row by passing its id. Also, the parameters should be separated by a coma not a dot.

PHP Code:

‘is_unique[categories,id,'.$this->request->getVar('category_id')']’ 


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