From 81c2f541b04452b4b60bc71fa3e1b166ebc18245 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Helen=20Hou-Sand=C3=AD?= <helen.y.hou@gmail.com>
Date: Tue, 7 Jul 2015 15:12:27 +0000
Subject: [PATCH] List tables: Add a fallback for the primary column.

Without a primary column defined, nothing shows in the responsive view at all, which is bad.

props mordauk.
see #25408.

Built from https://develop.svn.wordpress.org/trunk@33104


git-svn-id: http://core.svn.wordpress.org/trunk@33075 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-admin/includes/class-wp-list-table.php | 18 ++++++++++++++++--
 wp-includes/version.php                   |  2 +-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/wp-admin/includes/class-wp-list-table.php b/wp-admin/includes/class-wp-list-table.php
index 76fea0096c..9ec1bcee24 100644
--- a/wp-admin/includes/class-wp-list-table.php
+++ b/wp-admin/includes/class-wp-list-table.php
@@ -832,7 +832,21 @@ class WP_List_Table {
 	 * @return string Name of the default primary column, in this case, an empty string.
 	 */
 	protected function get_default_primary_column_name() {
-		return '';
+		$columns = $this->get_columns();
+		$column = '';
+
+		// We need a primary defined so responsive views show something,
+		// so let's fall back to the first non-checkbox column.
+		foreach( $columns as $col => $column_name ) {
+			if ( 'cb' === $col ) {
+				continue;
+			}
+
+			$column = $col;
+			break;
+		}
+
+		return $column;
 	}
 
 	/**
@@ -878,7 +892,7 @@ class WP_List_Table {
 		if ( isset( $this->_column_headers ) && is_array( $this->_column_headers ) ) {
 			// Back-compat for list tables that have been manually setting $_column_headers for horse reasons.
 			// In 4.3, we added a fourth argument for primary column.
-			$column_headers = array( array(), array(), array(), '' );
+			$column_headers = array( array(), array(), array(), $this->get_primary_column_name() );
 			foreach ( $this->_column_headers as $key => $value ) {
 				$column_headers[ $key ] = $value;
 			}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5eee1d187b..8b01b44d6d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-beta1-33103';
+$wp_version = '4.3-beta1-33104';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.