Same name in other branches

1. 7.x-3.x plugins/views_plugin_query_default.inc \views_plugin_query_default::add_field()

Add a field to the query table, possibly with an alias. This will automatically call ensure_table to make sure the required table exists, *unless* $table is unset.

Parameters

$table: The table this field is attached to. If NULL, it is assumed this will be a formula; otherwise, ensure_table is used to make sure the table exists.

$field: The name of the field to add. This may be a real field or a formula.

$alias: The alias to create. If not specified, the alias will be $table_$field unless $table is NULL. When adding formulae, it is recommended that an alias be used.

$params: An array of parameters additional to the field that will control items such as aggregation functions and DISTINCT.

Return value

$name The name that this field can be referred to as. Usually this is the alias.

2 calls to views_plugin_query_default::add_field()

views_plugin_query_default::add_orderby in plugins/views_plugin_query_default.inc

Add an ORDER BY clause to the query.

views_plugin_query_default::query in plugins/views_plugin_query_default.inc

Generate a query and a countquery from all of the information supplied to the object.

File

plugins/views_plugin_query_default.inc, line 685

Class

views_plugin_query_default

Object used to create a SELECT query.

Code

function add_field($table, $field, $alias = '', $params = array()) {
    // We check for this specifically because it gets a special alias.
    if ($table == $this->base_table && $field == $this->base_field && empty($alias)) {
        $alias = $this->base_field;
    }
    if ($table && empty($this->table_queue[$table])) {
        $this->ensure_table($table);
    }
    if (!$alias && $table) {
        $alias = $table . '_' . $field;
    }
    // Make sure an alias is assigned
    $alias = $alias ? $alias : $field;
    // PostgreSQL truncates aliases to 63 characters: http://drupal.org/node/571548
    // We limit the length of the original alias up to 60 characters
    // to get a unique alias later if its have duplicates
    $alias = substr($alias, 0, 60);
    // Create a field info array.
    $field_info = array(
        'field' => $field,
        'table' => $table,
        'alias' => $alias,
    ) + $params;
    // Test to see if the field is actually the same or not. Due to
    // differing parameters changing the aggregation function, we need
    // to do some automatic alias collision detection:
    $base = $alias;
    $counter = 0;
    while (!empty($this->fields[$alias]) && $this->fields[$alias] != $field_info) {
        $field_info['alias'] = $alias = $base . '_' . ++$counter;
    }
    if (empty($this->fields[$alias])) {
        $this->fields[$alias] = $field_info;
    }
    return $alias;
}