how to use a read_data to know if data entered in a field does not already exist in the database?
I have difficulties with read_data. I have a text field 'number' for which I must check if its value exists or not in the database. If so, it returns an error. To do this I decided to use a read_data. But I have the impression that the formula does not return a result. Tell me too if I have to put the formula in the 'submit' event. also tell me how to trigger the error when an item is found in the database
I have difficulties with read_data. I have a text field 'number' for which I must check if its value exists or not in the database. If so, it returns an error. To do this I decided to use a read_data. But I have the impression that the formula does not return a result. Tell me too if I have to put the formula in the 'submit' event. also tell me how to trigger the error when an item is found in the database
