I have a table named posts, and i want some fields to be not null. so whenever there is no data, i want to produce a msg. How can i make the fields as not null?
I have a table named posts , and i want some fields to be
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I have a table named posts, and i want some fields to be not null. so whenever there is no data, i want to produce a msg. How can i make the fields as not null?
When you create the table, just add “not null” after the data type for the column, e.g. “text not null”. This will cause an exception to be thrown if you try to add a record with a null value for that column. You can add a catch/rescue in your rails application to catch this exception.
However, a better way would probably be to validate the data before you even try to insert into the database using an ActiveRecord callback…