Fixed a bug where the var_id column wouldn't be consistently NULL

Author: kevincupp

el_playamatrix_importer/README.md

@@ -62,8 +62,10 @@ If you run into anything, head on over to [the issues](https://github.com/EllisL
 
 ## Change Log
 
+- 1.0.3 - May 10, 2016
+    - Fixed a bug (#3) where the importer may fail if the `var_id` column in the Matrix columns table wasn't consistently `NULL`.
 - 1.0.2 - May 9, 2016
-    - Fixed a bug (#2) where the importer may show an error if the `var_id` column was missing from the Matrix data table.
+    - Fixed a bug (#2) where the importer may show an error if the `var_id` column was missing from the Matrix columns table.
 - 1.0.1 - March 16, 2016
     - Fixed a bug (#1) where the importer would not work if either Playa or Matrix were uninstalled while the other was installed.
     - Fixed a bug (#1) where importing a Playa field that had no relationships would cause errors.

el_playamatrix_importer/libraries/matrix_importer.php

@@ -167,7 +167,8 @@ private function get_matrix_columns()
 		// Skip Low vars for now
 		if (ee()->db->field_exists('var_id', 'matrix_cols'))
 		{
-			ee()->db->where('var_id', NULL);
+			ee()->db->where('var_id', NULL)
+				->or_where('var_id', 0);
 		}
 		$columns_query = ee()->db->get('matrix_cols')->result_array();