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-rw-r--r--engine/lib/database.php133
-rw-r--r--engine/tests/objects/entities.php22
2 files changed, 67 insertions, 88 deletions
diff --git a/engine/lib/database.php b/engine/lib/database.php
index da068effd..d02427029 100644
--- a/engine/lib/database.php
+++ b/engine/lib/database.php
@@ -244,14 +244,11 @@ function explain_query($query, $link) {
* @throws DatabaseException
*/
function execute_query($query, $dblink) {
- global $CONFIG, $dbcalls, $DB_QUERY_CACHE;
+ global $CONFIG, $dbcalls;
$dbcalls++;
$result = mysql_query($query, $dblink);
- if ($DB_QUERY_CACHE) {
- $DB_QUERY_CACHE[$query] = -1; // Set initial cache to -1
- }
if (mysql_errno($dblink)) {
throw new DatabaseException(mysql_error($dblink) . "\n\n QUERY: " . $query);
@@ -327,59 +324,14 @@ function execute_delayed_read_query($query, $handler = "") {
* argument to $callback. If no callback function is defined, the
* entire result set is returned as an array.
*
- * If no results are matched, FALSE is returned.
- *
* @param mixed $query The query being passed.
* @param string $callback Optionally, the name of a function to call back to on each row
*
- * @return array|false An array of database result objects or callback function results or false
+ * @return array An array of database result objects or callback function results. If the query
+ * returned nothing, an empty array.
*/
function get_data($query, $callback = "") {
- global $CONFIG, $DB_QUERY_CACHE;
-
- // Is cached?
- if ($DB_QUERY_CACHE) {
- $cached_query = $DB_QUERY_CACHE[$query];
- }
-
- if ((isset($cached_query)) && ($cached_query)) {
- elgg_log("$query results returned from cache");
-
- if ($cached_query === -1) {
- // Last time this query returned nothing, so return an empty array
- return array();
- }
-
- return $cached_query;
- }
-
- $dblink = get_db_link('read');
- $resultarray = array();
-
- if ($result = execute_query("$query", $dblink)) {
- while ($row = mysql_fetch_object($result)) {
- if (!empty($callback) && is_callable($callback)) {
- $row = $callback($row);
- }
- if ($row) {
- $resultarray[] = $row;
- }
- }
- }
-
- if (empty($resultarray)) {
- elgg_log("DB query \"$query\" returned no results.");
- // @todo consider changing this to return empty array #1242
- return FALSE;
- }
-
- // Cache result
- if ($DB_QUERY_CACHE) {
- $DB_QUERY_CACHE[$query] = $resultarray;
- elgg_log("$query results cached");
- }
-
- return $resultarray;
+ return elgg_query_runner($query, $callback, false);
}
/**
@@ -395,47 +347,74 @@ function get_data($query, $callback = "") {
* @return mixed A single database result object or the result of the callback function.
*/
function get_data_row($query, $callback = "") {
+ return elgg_query_runner($query, $callback, true);
+}
+
+/**
+ * Handles returning data from a query, running it through a callback function,
+ * and caching the results.
+ *
+ * @access private
+ *
+ * @param string $query The query to execute
+ * @param string $callback An optional callback function to run on each row
+ * @param bool $single Return only a single result?
+ *
+ * @return array An array of database result objects or callback function results. If the query
+ * returned nothing, an empty array.
+ * @since 1.8
+ */
+function elgg_query_runner($query, $callback = null, $single = false) {
global $CONFIG, $DB_QUERY_CACHE;
- // Is cached
- if ($DB_QUERY_CACHE) {
- $cached_query = $DB_QUERY_CACHE[$query];
- }
+ // since we want to cache results of running the callback, we need to
+ // need to namespace the query with the callback, and single result request.
+ $hash = (string)$callback . (string)$single . $query;
- if ((isset($cached_query)) && ($cached_query)) {
- elgg_log("$query results returned from cache");
+ // Is cached?
+ if ($DB_QUERY_CACHE) {
+ $cached_query = $DB_QUERY_CACHE[$hash];
- if ($cached_query === -1) {
- // Last time this query returned nothing, so return false
- //@todo fix me this should return array().
- return FALSE;
+ if ($cached_query !== FALSE) {
+ elgg_log("$query results returned from cache (hash: $hash)");
+ return $cached_query;
}
-
- return $cached_query;
}
$dblink = get_db_link('read');
+ $return = array();
if ($result = execute_query("$query", $dblink)) {
- $row = mysql_fetch_object($result);
- // Cache result (even if query returned no data)
- if ($DB_QUERY_CACHE) {
- $DB_QUERY_CACHE[$query] = $row;
- elgg_log("$query results cached");
- }
-
- if (!empty($callback) && is_callable($callback)) {
+ // test for callback once instead of on each iteration.
+ // @todo check profiling to see if this needs to be broken out into
+ // explicit cases instead of checking in the interation.
+ $is_callable = is_callable($callback);
+ while ($row = mysql_fetch_object($result)) {
+ if ($is_callable) {
$row = $callback($row);
- }
+ }
- if ($row) {
- return $row;
+ if ($single) {
+ $return = $row;
+ break;
+ } else {
+ $return[] = $row;
+ }
}
}
- elgg_log("$query returned no results.");
- return FALSE;
+ if (empty($return)) {
+ elgg_log("DB query \"$query\" returned no results.");
+ }
+
+ // Cache result
+ if ($DB_QUERY_CACHE) {
+ $DB_QUERY_CACHE[$hash] = $return;
+ elgg_log("$query results cached (hash: $hash)");
+ }
+
+ return $return;
}
/**
diff --git a/engine/tests/objects/entities.php b/engine/tests/objects/entities.php
index 56c8f7947..8e7e30c5b 100644
--- a/engine/tests/objects/entities.php
+++ b/engine/tests/objects/entities.php
@@ -118,7 +118,7 @@ class ElggCoreEntityTest extends ElggCoreUnitTest {
$this->assertIsA($annotations[0], 'ElggAnnotation');
$this->assertIdentical($annotations[0]->name, 'non_existent');
$this->assertEqual($this->entity->countAnnotations('non_existent'), 1);
-
+
$this->assertIdentical($annotations, get_annotations($this->entity->getGUID()));
$this->assertIdentical($annotations, get_annotations($this->entity->getGUID(), 'site'));
$this->assertIdentical($annotations, get_annotations($this->entity->getGUID(), 'site', 'testing'));
@@ -127,10 +127,10 @@ class ElggCoreEntityTest extends ElggCoreUnitTest {
// clear annotation
$this->assertTrue($this->entity->clearAnnotations());
$this->assertEqual($this->entity->countAnnotations('non_existent'), 0);
-
- $this->assertIdentical(FALSE, get_annotations($this->entity->getGUID()));
- $this->assertIdentical(FALSE, get_annotations($this->entity->getGUID(), 'site'));
- $this->assertIdentical(FALSE, get_annotations($this->entity->getGUID(), 'site', 'testing'));
+
+ $this->assertIdentical(array(), get_annotations($this->entity->getGUID()));
+ $this->assertIdentical(array(), get_annotations($this->entity->getGUID(), 'site'));
+ $this->assertIdentical(array(), get_annotations($this->entity->getGUID(), 'site', 'testing'));
// clean up
$this->assertTrue($this->entity->delete());
@@ -201,30 +201,30 @@ class ElggCoreEntityTest extends ElggCoreUnitTest {
$this->assertTrue($this->entity->enable());
$this->assertTrue($this->entity->delete());
}
-
+
public function testElggEntityMetadata() {
// let's delte a non-existent metadata
$this->assertFalse($this->entity->clearMetaData('important'));
-
+
// let's add the meatadata
$this->assertTrue($this->entity->important = 'indeed!');
$this->assertTrue($this->entity->less_important = 'true, too!');
$this->save_entity();
-
+
// test deleting incorrectly
// @link http://trac.elgg.org/ticket/2273
$this->assertFalse($this->entity->clearMetaData('impotent'));
$this->assertEqual($this->entity->important, 'indeed!');
-
+
// get rid of one metadata
$this->assertEqual($this->entity->important, 'indeed!');
$this->assertTrue($this->entity->clearMetaData('important'));
$this->assertEqual($this->entity->important, '');
-
+
// get rid of all metadata
$this->assertTrue($this->entity->clearMetaData());
$this->assertEqual($this->entity->less_important, '');
-
+
// clean up database
$this->assertTrue($this->entity->delete());
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 21:38:42 +0000