| 1 | @@ -629,6 +645,7 @@ function _list_meta_row( $entry, &$count ) {
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| 2 | * Prints the form in the Custom Fields meta box.
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| 3 | *
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| 4 | * @since 1.2.0
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| 5 | + * @since x.x.x The default list of meta keys used to populate the dropdown was removed.
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| 6 | *
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| 7 | * @global wpdb $wpdb WordPress database abstraction object.
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| 8 | *
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| 9 | @@ -651,24 +668,7 @@ function meta_form( $post = null ) {
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| 10 | */
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| 11 | $keys = apply_filters( 'postmeta_form_keys', null, $post );
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| 12 |
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| 13 | - if ( null === $keys ) {
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| 14 | - /**
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| 15 | - * Filters the number of custom fields to retrieve for the drop-down
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| 16 | - * in the Custom Fields meta box.
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| 17 | - *
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| 18 | - * @since 2.1.0
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| 19 | - *
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| 20 | - * @param int $limit Number of custom fields to retrieve. Default 30.
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| 21 | - */
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| 22 | - $limit = apply_filters( 'postmeta_form_limit', 30 );
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| 23 | - $sql = "SELECT DISTINCT meta_key
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| 24 | - FROM $wpdb->postmeta
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| 25 | - WHERE meta_key NOT BETWEEN '_' AND '_z'
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| 26 | - HAVING meta_key NOT LIKE %s
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| 27 | - ORDER BY meta_key
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| 28 | - LIMIT %d";
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| 29 | - $keys = $wpdb->get_col( $wpdb->prepare( $sql, $wpdb->esc_like( '_' ) . '%', $limit ) );
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| 30 | - }
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| 31 | + assertNotEmpty($keys)
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