title: SQLSTATE[22007]: Invalid datetime format: 1366 Incorrect integer value: 'column_name' in Laravel
body: <p>Laravel Multiple Data Insert Error</p>
  <blockquote>
  <p>SQLSTATE[22007]: Invalid datetime format: 1366 Incorrect integer value: '' for column 'unit_id' at row 2 (SQL: insert into <code>product_prices</code> (<code>created_at</code>, <code>product_id</code>, <code>unit_id</code>, <code>updated_at</code>) values (2016-12-06 06:56:01, 27, 1,2016-12-06 06:56:01), (2016-12-06 06:56:01,27, , 2016-12-06 06:56:01))</p>
  </blockquote>
  <p>But my <code>unit_id</code> field in <code>nullable();</code>
  Please someone help me
  Here <code>column_name=unit_id</code></p>