Saves (inserts or updates) a record to the database based upon the schema.

Do not use drupal_write_record() within hook_update_N() functions, since the database schema cannot be relied upon when a user is running a series of updates. Instead, use db_insert() or db_update() to save the record.

Parameters

$table: The name of the table; this must be defined by a hook_schema() implementation.

$record: An object or array representing the record to write, passed in by reference. If inserting a new record, values not provided in $record will be populated in $record and in the database with the default values from the schema, as well as a single serial (auto-increment) field (if present). If updating an existing record, only provided values are updated in the database, and $record is not modified.

$primary_keys: To indicate that this is a new record to be inserted, omit this argument. If this is an update, this argument specifies the primary keys' field names. If there is only 1 field in the key, you may pass in a string; if there are multiple fields in the key, pass in an array.

Return value

If the record insert or update failed, returns FALSE. If it succeeded, returns SAVED_NEW or SAVED_UPDATED, depending on the operation performed.

Related topics

33 calls to drupal_write_record()

block_theme_initialize in modules/block/block.module

Assigns an initial, default set of blocks for a theme.

comment_save in modules/comment/comment.module

Accepts a submission of new or changed comment content.

contact_category_edit_form_submit in modules/contact/contact.admin.inc

Form submission handler for contact_category_edit_form().

DrupalDataApiTest::testDrupalWriteRecord in modules/simpletest/tests/common.test

Test the drupal_write_record() API function.

EntityFieldQueryTestCase::setUp in modules/simpletest/tests/entity_query.test

Sets up a Drupal site for running functional and integration tests.

... See full list

File

includes/common.inc, line 7481

Code

function drupal_write_record($table, &$record, $primary_keys = array()) {
    // Standardize $primary_keys to an array.
    if (is_string($primary_keys)) {
        $primary_keys = array(
            $primary_keys,
        );
    }
    $schema = drupal_get_schema($table);
    if (empty($schema)) {
        return FALSE;
    }
    $object = (object) $record;
    $fields = array();
    // Go through the schema to determine fields to write.
    foreach ($schema['fields'] as $field => $info) {
        if ($info['type'] == 'serial') {
            // Skip serial types if we are updating.
            if (!empty($primary_keys)) {
                continue;
            }
            // Track serial field so we can helpfully populate them after the query.
            // NOTE: Each table should come with one serial field only.
            $serial = $field;
        }
        // Skip field if it is in $primary_keys as it is unnecessary to update a
        // field to the value it is already set to.
        if (in_array($field, $primary_keys)) {
            continue;
        }
        if (!property_exists($object, $field)) {
            // Skip fields that are not provided, default values are already known
            // by the database.
            continue;
        }
        // Build array of fields to update or insert.
        if (empty($info['serialize'])) {
            $fields[$field] = $object->{$field};
        }
        else {
            $fields[$field] = serialize($object->{$field});
        }
        // Type cast to proper datatype, except when the value is NULL and the
        // column allows this.
        //
        // MySQL PDO silently casts e.g. FALSE and '' to 0 when inserting the value
        // into an integer column, but PostgreSQL PDO does not. Also type cast NULL
        // when the column does not allow this.
        if (isset($object->{$field}) || !empty($info['not null'])) {
            if ($info['type'] == 'int' || $info['type'] == 'serial') {
                $fields[$field] = (int) $fields[$field];
            }
            elseif ($info['type'] == 'float') {
                $fields[$field] = (double) $fields[$field];
            }
            else {
                $fields[$field] = (string) $fields[$field];
            }
        }
    }
    if (empty($fields)) {
        return;
    }
    // Build the SQL.
    if (empty($primary_keys)) {
        // We are doing an insert.
        $options = array(
            'return' => Database::RETURN_INSERT_ID,
        );
        if (isset($serial) && isset($fields[$serial])) {
            // If the serial column has been explicitly set with an ID, then we don't
            // require the database to return the last insert id.
            if ($fields[$serial]) {
                $options['return'] = Database::RETURN_AFFECTED;
            }
            else {
                unset($fields[$serial]);
            }
        }
        $query = db_insert($table, $options)->fields($fields);
        $return = SAVED_NEW;
    }
    else {
        $query = db_update($table)->fields($fields);
        foreach ($primary_keys as $key) {
            $query->condition($key, $object->{$key});
        }
        $return = SAVED_UPDATED;
    }
    // Execute the SQL.
    if ($query_return = $query->execute()) {
        if (isset($serial)) {
            // If the database was not told to return the last insert id, it will be
            // because we already know it.
            if (isset($options) && $options['return'] != Database::RETURN_INSERT_ID) {
                $object->{$serial} = $fields[$serial];
            }
            else {
                $object->{$serial} = $query_return;
            }
        }
    }
    elseif ($query_return === FALSE && count($primary_keys) == 1) {
        $return = FALSE;
    }
    // If we are inserting, populate empty fields with default values.
    if (empty($primary_keys)) {
        foreach ($schema['fields'] as $field => $info) {
            if (isset($info['default']) && !property_exists($object, $field)) {
                $object->{$field} = $info['default'];
            }
        }
    }
    // If we began with an array, convert back.
    if (is_array($record)) {
        $record = (array) $object;
    }
    return $return;
}

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