1 |
85ad3d82
|
Assos Assos
|
<?php
|
2 |
|
|
|
3 |
|
|
/**
|
4 |
|
|
* @file
|
5 |
|
|
* Search query extender and helper functions.
|
6 |
|
|
*/
|
7 |
|
|
|
8 |
|
|
/**
|
9 |
|
|
* Do a query on the full-text search index for a word or words.
|
10 |
|
|
*
|
11 |
|
|
* This function is normally only called by each module that supports the
|
12 |
|
|
* indexed search (and thus, implements hook_update_index()).
|
13 |
|
|
*
|
14 |
|
|
* Results are retrieved in two logical passes. However, the two passes are
|
15 |
|
|
* joined together into a single query. And in the case of most simple
|
16 |
|
|
* queries the second pass is not even used.
|
17 |
|
|
*
|
18 |
|
|
* The first pass selects a set of all possible matches, which has the benefit
|
19 |
|
|
* of also providing the exact result set for simple "AND" or "OR" searches.
|
20 |
|
|
*
|
21 |
|
|
* The second portion of the query further refines this set by verifying
|
22 |
|
|
* advanced text conditions (such as negative or phrase matches).
|
23 |
|
|
*
|
24 |
|
|
* The used query object has the tag 'search_$module' and can be further
|
25 |
|
|
* extended with hook_query_alter().
|
26 |
|
|
*/
|
27 |
|
|
class SearchQuery extends SelectQueryExtender {
|
28 |
|
|
/**
|
29 |
|
|
* The search query that is used for searching.
|
30 |
|
|
*
|
31 |
|
|
* @var string
|
32 |
|
|
*/
|
33 |
|
|
protected $searchExpression;
|
34 |
|
|
|
35 |
|
|
/**
|
36 |
|
|
* Type of search (search module).
|
37 |
|
|
*
|
38 |
|
|
* This maps to the value of the type column in search_index, and is equal
|
39 |
|
|
* to the machine-readable name of the module that implements
|
40 |
|
|
* hook_search_info().
|
41 |
|
|
*
|
42 |
|
|
* @var string
|
43 |
|
|
*/
|
44 |
|
|
protected $type;
|
45 |
|
|
|
46 |
|
|
/**
|
47 |
|
|
* Positive and negative search keys.
|
48 |
|
|
*
|
49 |
|
|
* @var array
|
50 |
|
|
*/
|
51 |
|
|
protected $keys = array('positive' => array(), 'negative' => array());
|
52 |
|
|
|
53 |
|
|
/**
|
54 |
|
|
* Indicates whether the first pass query requires complex conditions (LIKE).
|
55 |
|
|
*
|
56 |
|
|
* @var boolean.
|
57 |
|
|
*/
|
58 |
|
|
protected $simple = TRUE;
|
59 |
|
|
|
60 |
|
|
/**
|
61 |
|
|
* Conditions that are used for exact searches.
|
62 |
|
|
*
|
63 |
|
|
* This is always used for the second pass query but not for the first pass,
|
64 |
|
|
* unless $this->simple is FALSE.
|
65 |
|
|
*
|
66 |
|
|
* @var DatabaseCondition
|
67 |
|
|
*/
|
68 |
|
|
protected $conditions;
|
69 |
|
|
|
70 |
|
|
/**
|
71 |
|
|
* Indicates how many matches for a search query are necessary.
|
72 |
|
|
*
|
73 |
|
|
* @var int
|
74 |
|
|
*/
|
75 |
|
|
protected $matches = 0;
|
76 |
|
|
|
77 |
|
|
/**
|
78 |
|
|
* Array of search words.
|
79 |
|
|
*
|
80 |
|
|
* These words have to match against {search_index}.word.
|
81 |
|
|
*
|
82 |
|
|
* @var array
|
83 |
|
|
*/
|
84 |
|
|
protected $words = array();
|
85 |
|
|
|
86 |
|
|
/**
|
87 |
|
|
* Multiplier for the normalized search score.
|
88 |
|
|
*
|
89 |
|
|
* This value is calculated by the first pass query and multiplied with the
|
90 |
|
|
* actual score of a specific word to make sure that the resulting calculated
|
91 |
|
|
* score is between 0 and 1.
|
92 |
|
|
*
|
93 |
|
|
* @var float
|
94 |
|
|
*/
|
95 |
|
|
protected $normalize;
|
96 |
|
|
|
97 |
|
|
/**
|
98 |
|
|
* Indicates whether the first pass query has been executed.
|
99 |
|
|
*
|
100 |
|
|
* @var boolean
|
101 |
|
|
*/
|
102 |
|
|
protected $executedFirstPass = FALSE;
|
103 |
|
|
|
104 |
|
|
/**
|
105 |
|
|
* Stores score expressions.
|
106 |
|
|
*
|
107 |
|
|
* @var array
|
108 |
|
|
*
|
109 |
|
|
* @see addScore()
|
110 |
|
|
*/
|
111 |
|
|
protected $scores = array();
|
112 |
|
|
|
113 |
|
|
/**
|
114 |
|
|
* Stores arguments for score expressions.
|
115 |
|
|
*
|
116 |
|
|
* @var array
|
117 |
|
|
*/
|
118 |
|
|
protected $scoresArguments = array();
|
119 |
|
|
|
120 |
|
|
/**
|
121 |
|
|
* Stores multipliers for score expressions.
|
122 |
|
|
*
|
123 |
|
|
* @var array
|
124 |
|
|
*/
|
125 |
|
|
protected $multiply = array();
|
126 |
|
|
|
127 |
|
|
/**
|
128 |
|
|
* Whether or not search expressions were ignored.
|
129 |
|
|
*
|
130 |
|
|
* The maximum number of AND/OR combinations exceeded can be configured to
|
131 |
|
|
* avoid Denial-of-Service attacks. Expressions beyond the limit are ignored.
|
132 |
|
|
*
|
133 |
|
|
* @var boolean
|
134 |
|
|
*/
|
135 |
|
|
protected $expressionsIgnored = FALSE;
|
136 |
|
|
|
137 |
|
|
/**
|
138 |
|
|
* Sets up the search query expression.
|
139 |
|
|
*
|
140 |
|
|
* @param $query
|
141 |
|
|
* A search query string, which can contain options.
|
142 |
|
|
* @param $module
|
143 |
|
|
* The search module. This maps to {search_index}.type in the database.
|
144 |
|
|
*
|
145 |
|
|
* @return
|
146 |
|
|
* The SearchQuery object.
|
147 |
|
|
*/
|
148 |
|
|
public function searchExpression($expression, $module) {
|
149 |
|
|
$this->searchExpression = $expression;
|
150 |
|
|
$this->type = $module;
|
151 |
|
|
|
152 |
|
|
return $this;
|
153 |
|
|
}
|
154 |
|
|
|
155 |
|
|
/**
|
156 |
|
|
* Applies a search option and removes it from the search query string.
|
157 |
|
|
*
|
158 |
|
|
* These options are in the form option:value,value2,value3.
|
159 |
|
|
*
|
160 |
|
|
* @param $option
|
161 |
|
|
* Name of the option.
|
162 |
|
|
* @param $column
|
163 |
|
|
* Name of the database column to which the value should be applied.
|
164 |
|
|
*
|
165 |
|
|
* @return
|
166 |
|
|
* TRUE if a value for that option was found, FALSE if not.
|
167 |
|
|
*/
|
168 |
|
|
public function setOption($option, $column) {
|
169 |
|
|
if ($values = search_expression_extract($this->searchExpression, $option)) {
|
170 |
|
|
$or = db_or();
|
171 |
|
|
foreach (explode(',', $values) as $value) {
|
172 |
|
|
$or->condition($column, $value);
|
173 |
|
|
}
|
174 |
|
|
$this->condition($or);
|
175 |
|
|
$this->searchExpression = search_expression_insert($this->searchExpression, $option);
|
176 |
|
|
return TRUE;
|
177 |
|
|
}
|
178 |
|
|
return FALSE;
|
179 |
|
|
}
|
180 |
|
|
|
181 |
|
|
/**
|
182 |
|
|
* Parses the search query into SQL conditions.
|
183 |
|
|
*
|
184 |
|
|
* We build two queries that match the dataset bodies.
|
185 |
|
|
*/
|
186 |
|
|
protected function parseSearchExpression() {
|
187 |
|
|
// Matchs words optionally prefixed by a dash. A word in this case is
|
188 |
|
|
// something between two spaces, optionally quoted.
|
189 |
|
|
preg_match_all('/ (-?)("[^"]+"|[^" ]+)/i', ' ' . $this->searchExpression , $keywords, PREG_SET_ORDER);
|
190 |
|
|
|
191 |
|
|
if (count($keywords) == 0) {
|
192 |
|
|
return;
|
193 |
|
|
}
|
194 |
|
|
|
195 |
|
|
// Classify tokens.
|
196 |
|
|
$or = FALSE;
|
197 |
|
|
$warning = '';
|
198 |
|
|
$limit_combinations = variable_get('search_and_or_limit', 7);
|
199 |
|
|
// The first search expression does not count as AND.
|
200 |
|
|
$and_count = -1;
|
201 |
|
|
$or_count = 0;
|
202 |
|
|
foreach ($keywords as $match) {
|
203 |
|
|
if ($or_count && $and_count + $or_count >= $limit_combinations) {
|
204 |
|
|
// Ignore all further search expressions to prevent Denial-of-Service
|
205 |
|
|
// attacks using a high number of AND/OR combinations.
|
206 |
|
|
$this->expressionsIgnored = TRUE;
|
207 |
|
|
break;
|
208 |
|
|
}
|
209 |
|
|
$phrase = FALSE;
|
210 |
|
|
// Strip off phrase quotes.
|
211 |
|
|
if ($match[2]{0} == '"') {
|
212 |
|
|
$match[2] = substr($match[2], 1, -1);
|
213 |
|
|
$phrase = TRUE;
|
214 |
|
|
$this->simple = FALSE;
|
215 |
|
|
}
|
216 |
|
|
// Simplify keyword according to indexing rules and external
|
217 |
|
|
// preprocessors. Use same process as during search indexing, so it
|
218 |
|
|
// will match search index.
|
219 |
|
|
$words = search_simplify($match[2]);
|
220 |
|
|
// Re-explode in case simplification added more words, except when
|
221 |
|
|
// matching a phrase.
|
222 |
|
|
$words = $phrase ? array($words) : preg_split('/ /', $words, -1, PREG_SPLIT_NO_EMPTY);
|
223 |
|
|
// Negative matches.
|
224 |
|
|
if ($match[1] == '-') {
|
225 |
|
|
$this->keys['negative'] = array_merge($this->keys['negative'], $words);
|
226 |
|
|
}
|
227 |
|
|
// OR operator: instead of a single keyword, we store an array of all
|
228 |
|
|
// OR'd keywords.
|
229 |
|
|
elseif ($match[2] == 'OR' && count($this->keys['positive'])) {
|
230 |
|
|
$last = array_pop($this->keys['positive']);
|
231 |
|
|
// Starting a new OR?
|
232 |
|
|
if (!is_array($last)) {
|
233 |
|
|
$last = array($last);
|
234 |
|
|
}
|
235 |
|
|
$this->keys['positive'][] = $last;
|
236 |
|
|
$or = TRUE;
|
237 |
|
|
$or_count++;
|
238 |
|
|
continue;
|
239 |
|
|
}
|
240 |
|
|
// AND operator: implied, so just ignore it.
|
241 |
|
|
elseif ($match[2] == 'AND' || $match[2] == 'and') {
|
242 |
|
|
$warning = $match[2];
|
243 |
|
|
continue;
|
244 |
|
|
}
|
245 |
|
|
|
246 |
|
|
// Plain keyword.
|
247 |
|
|
else {
|
248 |
|
|
if ($match[2] == 'or') {
|
249 |
|
|
$warning = $match[2];
|
250 |
|
|
}
|
251 |
|
|
if ($or) {
|
252 |
|
|
// Add to last element (which is an array).
|
253 |
|
|
$this->keys['positive'][count($this->keys['positive']) - 1] = array_merge($this->keys['positive'][count($this->keys['positive']) - 1], $words);
|
254 |
|
|
}
|
255 |
|
|
else {
|
256 |
|
|
$this->keys['positive'] = array_merge($this->keys['positive'], $words);
|
257 |
|
|
$and_count++;
|
258 |
|
|
}
|
259 |
|
|
}
|
260 |
|
|
$or = FALSE;
|
261 |
|
|
}
|
262 |
|
|
|
263 |
|
|
// Convert keywords into SQL statements.
|
264 |
|
|
$this->conditions = db_and();
|
265 |
|
|
$simple_and = FALSE;
|
266 |
|
|
$simple_or = FALSE;
|
267 |
|
|
// Positive matches.
|
268 |
|
|
foreach ($this->keys['positive'] as $key) {
|
269 |
|
|
// Group of ORed terms.
|
270 |
|
|
if (is_array($key) && count($key)) {
|
271 |
|
|
$simple_or = TRUE;
|
272 |
|
|
$any = FALSE;
|
273 |
|
|
$queryor = db_or();
|
274 |
|
|
foreach ($key as $or) {
|
275 |
|
|
list($num_new_scores) = $this->parseWord($or);
|
276 |
|
|
$any |= $num_new_scores;
|
277 |
|
|
$queryor->condition('d.data', "% $or %", 'LIKE');
|
278 |
|
|
}
|
279 |
|
|
if (count($queryor)) {
|
280 |
|
|
$this->conditions->condition($queryor);
|
281 |
|
|
// A group of OR keywords only needs to match once.
|
282 |
|
|
$this->matches += ($any > 0);
|
283 |
|
|
}
|
284 |
|
|
}
|
285 |
|
|
// Single ANDed term.
|
286 |
|
|
else {
|
287 |
|
|
$simple_and = TRUE;
|
288 |
|
|
list($num_new_scores, $num_valid_words) = $this->parseWord($key);
|
289 |
|
|
$this->conditions->condition('d.data', "% $key %", 'LIKE');
|
290 |
|
|
if (!$num_valid_words) {
|
291 |
|
|
$this->simple = FALSE;
|
292 |
|
|
}
|
293 |
|
|
// Each AND keyword needs to match at least once.
|
294 |
|
|
$this->matches += $num_new_scores;
|
295 |
|
|
}
|
296 |
|
|
}
|
297 |
|
|
if ($simple_and && $simple_or) {
|
298 |
|
|
$this->simple = FALSE;
|
299 |
|
|
}
|
300 |
|
|
// Negative matches.
|
301 |
|
|
foreach ($this->keys['negative'] as $key) {
|
302 |
|
|
$this->conditions->condition('d.data', "% $key %", 'NOT LIKE');
|
303 |
|
|
$this->simple = FALSE;
|
304 |
|
|
}
|
305 |
|
|
|
306 |
|
|
if ($warning == 'or') {
|
307 |
|
|
drupal_set_message(t('Search for either of the two terms with uppercase <strong>OR</strong>. For example, <strong>cats OR dogs</strong>.'));
|
308 |
|
|
}
|
309 |
|
|
}
|
310 |
|
|
|
311 |
|
|
/**
|
312 |
|
|
* Helper function for parseQuery().
|
313 |
|
|
*/
|
314 |
|
|
protected function parseWord($word) {
|
315 |
|
|
$num_new_scores = 0;
|
316 |
|
|
$num_valid_words = 0;
|
317 |
|
|
// Determine the scorewords of this word/phrase.
|
318 |
|
|
$split = explode(' ', $word);
|
319 |
|
|
foreach ($split as $s) {
|
320 |
|
|
$num = is_numeric($s);
|
321 |
|
|
if ($num || drupal_strlen($s) >= variable_get('minimum_word_size', 3)) {
|
322 |
|
|
if (!isset($this->words[$s])) {
|
323 |
|
|
$this->words[$s] = $s;
|
324 |
|
|
$num_new_scores++;
|
325 |
|
|
}
|
326 |
|
|
$num_valid_words++;
|
327 |
|
|
}
|
328 |
|
|
}
|
329 |
|
|
// Return matching snippet and number of added words.
|
330 |
|
|
return array($num_new_scores, $num_valid_words);
|
331 |
|
|
}
|
332 |
|
|
|
333 |
|
|
/**
|
334 |
|
|
* Executes the first pass query.
|
335 |
|
|
*
|
336 |
|
|
* This can either be done explicitly, so that additional scores and
|
337 |
|
|
* conditions can be applied to the second pass query, or implicitly by
|
338 |
|
|
* addScore() or execute().
|
339 |
|
|
*
|
340 |
|
|
* @return
|
341 |
|
|
* TRUE if search items exist, FALSE if not.
|
342 |
|
|
*/
|
343 |
|
|
public function executeFirstPass() {
|
344 |
|
|
$this->parseSearchExpression();
|
345 |
|
|
|
346 |
|
|
if (count($this->words) == 0) {
|
347 |
|
|
form_set_error('keys', format_plural(variable_get('minimum_word_size', 3), 'You must include at least one positive keyword with 1 character or more.', 'You must include at least one positive keyword with @count characters or more.'));
|
348 |
|
|
return FALSE;
|
349 |
|
|
}
|
350 |
|
|
if ($this->expressionsIgnored) {
|
351 |
|
|
drupal_set_message(t('Your search used too many AND/OR expressions. Only the first @count terms were included in this search.', array('@count' => variable_get('search_and_or_limit', 7))), 'warning');
|
352 |
|
|
}
|
353 |
|
|
$this->executedFirstPass = TRUE;
|
354 |
|
|
|
355 |
|
|
if (!empty($this->words)) {
|
356 |
|
|
$or = db_or();
|
357 |
|
|
foreach ($this->words as $word) {
|
358 |
|
|
$or->condition('i.word', $word);
|
359 |
|
|
}
|
360 |
|
|
$this->condition($or);
|
361 |
|
|
}
|
362 |
|
|
// Build query for keyword normalization.
|
363 |
|
|
$this->join('search_total', 't', 'i.word = t.word');
|
364 |
|
|
$this
|
365 |
|
|
->condition('i.type', $this->type)
|
366 |
|
|
->groupBy('i.type')
|
367 |
|
|
->groupBy('i.sid')
|
368 |
|
|
->having('COUNT(*) >= :matches', array(':matches' => $this->matches));
|
369 |
|
|
|
370 |
|
|
// Clone the query object to do the firstPass query;
|
371 |
|
|
$first = clone $this->query;
|
372 |
|
|
|
373 |
|
|
// For complex search queries, add the LIKE conditions to the first pass query.
|
374 |
|
|
if (!$this->simple) {
|
375 |
|
|
$first->join('search_dataset', 'd', 'i.sid = d.sid AND i.type = d.type');
|
376 |
|
|
$first->condition($this->conditions);
|
377 |
|
|
}
|
378 |
|
|
|
379 |
|
|
// Calculate maximum keyword relevance, to normalize it.
|
380 |
|
|
$first->addExpression('SUM(i.score * t.count)', 'calculated_score');
|
381 |
|
|
$this->normalize = $first
|
382 |
|
|
->range(0, 1)
|
383 |
|
|
->orderBy('calculated_score', 'DESC')
|
384 |
|
|
->execute()
|
385 |
|
|
->fetchField();
|
386 |
|
|
|
387 |
|
|
if ($this->normalize) {
|
388 |
|
|
return TRUE;
|
389 |
|
|
}
|
390 |
|
|
return FALSE;
|
391 |
|
|
}
|
392 |
|
|
|
393 |
|
|
/**
|
394 |
|
|
* Adds a custom score expression to the search query.
|
395 |
|
|
*
|
396 |
|
|
* Score expressions are used to order search results. If no calls to
|
397 |
|
|
* addScore() have taken place, a default keyword relevance score will be
|
398 |
|
|
* used. However, if at least one call to addScore() has taken place, the
|
399 |
|
|
* keyword relevance score is not automatically added.
|
400 |
|
|
*
|
401 |
|
|
* Also note that if you call orderBy() directly on the query, search scores
|
402 |
|
|
* will not automatically be used to order search results. Your orderBy()
|
403 |
|
|
* expression can reference 'calculated_score', which will be the total
|
404 |
|
|
* calculated score value.
|
405 |
|
|
*
|
406 |
|
|
* @param $score
|
407 |
|
|
* The score expression, which should evaluate to a number between 0 and 1.
|
408 |
|
|
* The string 'i.relevance' in a score expression will be replaced by a
|
409 |
|
|
* measure of keyword relevance between 0 and 1.
|
410 |
|
|
* @param $arguments
|
411 |
|
|
* Query arguments needed to provide values to the score expression.
|
412 |
|
|
* @param $multiply
|
413 |
|
|
* If set, the score is multiplied with this value. However, all scores
|
414 |
|
|
* with multipliers are then divided by the total of all multipliers, so
|
415 |
|
|
* that overall, the normalization is maintained.
|
416 |
|
|
*
|
417 |
|
|
* @return object
|
418 |
|
|
* The updated query object.
|
419 |
|
|
*/
|
420 |
|
|
public function addScore($score, $arguments = array(), $multiply = FALSE) {
|
421 |
|
|
if ($multiply) {
|
422 |
|
|
$i = count($this->multiply);
|
423 |
|
|
// Modify the score expression so it is multiplied by the multiplier,
|
424 |
|
|
// with a divisor to renormalize.
|
425 |
|
|
$score = "CAST(:multiply_$i AS DECIMAL) * COALESCE(( " . $score . "), 0) / CAST(:total_$i AS DECIMAL)";
|
426 |
|
|
// Add an argument for the multiplier. The :total_$i argument is taken
|
427 |
|
|
// care of in the execute() method, which is when the total divisor is
|
428 |
|
|
// calculated.
|
429 |
|
|
$arguments[':multiply_' . $i] = $multiply;
|
430 |
|
|
$this->multiply[] = $multiply;
|
431 |
|
|
}
|
432 |
|
|
|
433 |
|
|
$this->scores[] = $score;
|
434 |
|
|
$this->scoresArguments += $arguments;
|
435 |
|
|
|
436 |
|
|
return $this;
|
437 |
|
|
}
|
438 |
|
|
|
439 |
|
|
/**
|
440 |
|
|
* Executes the search.
|
441 |
|
|
*
|
442 |
|
|
* If not already done, this executes the first pass query. Then the complex
|
443 |
|
|
* conditions are applied to the query including score expressions and
|
444 |
|
|
* ordering.
|
445 |
|
|
*
|
446 |
|
|
* @return
|
447 |
|
|
* FALSE if the first pass query returned no results, and a database result
|
448 |
|
|
* set if there were results.
|
449 |
|
|
*/
|
450 |
|
|
public function execute()
|
451 |
|
|
{
|
452 |
|
|
if (!$this->executedFirstPass) {
|
453 |
|
|
$this->executeFirstPass();
|
454 |
|
|
}
|
455 |
|
|
if (!$this->normalize) {
|
456 |
|
|
return new DatabaseStatementEmpty();
|
457 |
|
|
}
|
458 |
|
|
|
459 |
|
|
// Add conditions to query.
|
460 |
|
|
$this->join('search_dataset', 'd', 'i.sid = d.sid AND i.type = d.type');
|
461 |
|
|
$this->condition($this->conditions);
|
462 |
|
|
|
463 |
|
|
if (empty($this->scores)) {
|
464 |
|
|
// Add default score.
|
465 |
|
|
$this->addScore('i.relevance');
|
466 |
|
|
}
|
467 |
|
|
|
468 |
|
|
if (count($this->multiply)) {
|
469 |
|
|
// Re-normalize scores with multipliers by dividing by the total of all
|
470 |
|
|
// multipliers. The expressions were altered in addScore(), so here just
|
471 |
|
|
// add the arguments for the total.
|
472 |
|
|
$i = 0;
|
473 |
|
|
$sum = array_sum($this->multiply);
|
474 |
|
|
foreach ($this->multiply as $total) {
|
475 |
|
|
$this->scoresArguments[':total_' . $i] = $sum;
|
476 |
|
|
$i++;
|
477 |
|
|
}
|
478 |
|
|
}
|
479 |
|
|
|
480 |
|
|
// Replace the pseudo-expression 'i.relevance' with a measure of keyword
|
481 |
|
|
// relevance in all score expressions, using string replacement. Careful
|
482 |
|
|
// though! If you just print out a float, some locales use ',' as the
|
483 |
|
|
// decimal separator in PHP, while SQL always uses '.'. So, make sure to
|
484 |
|
|
// set the number format correctly.
|
485 |
|
|
$relevance = number_format((1.0 / $this->normalize), 10, '.', '');
|
486 |
|
|
$this->scores = str_replace('i.relevance', '(' . $relevance . ' * i.score * t.count)', $this->scores);
|
487 |
|
|
|
488 |
|
|
// Add all scores together to form a query field.
|
489 |
|
|
$this->addExpression('SUM(' . implode(' + ', $this->scores) . ')', 'calculated_score', $this->scoresArguments);
|
490 |
|
|
|
491 |
|
|
// If an order has not yet been set for this query, add a default order
|
492 |
|
|
// that sorts by the calculated sum of scores.
|
493 |
|
|
if (count($this->getOrderBy()) == 0) {
|
494 |
|
|
$this->orderBy('calculated_score', 'DESC');
|
495 |
|
|
}
|
496 |
|
|
|
497 |
|
|
// Add tag and useful metadata.
|
498 |
|
|
$this
|
499 |
|
|
->addTag('search_' . $this->type)
|
500 |
|
|
->addMetaData('normalize', $this->normalize)
|
501 |
|
|
->fields('i', array('type', 'sid'));
|
502 |
|
|
|
503 |
|
|
return $this->query->execute();
|
504 |
|
|
}
|
505 |
|
|
|
506 |
|
|
/**
|
507 |
|
|
* Builds the default count query for SearchQuery.
|
508 |
|
|
*
|
509 |
|
|
* Since SearchQuery always uses GROUP BY, we can default to a subquery. We
|
510 |
|
|
* also add the same conditions as execute() because countQuery() is called
|
511 |
|
|
* first.
|
512 |
|
|
*/
|
513 |
|
|
public function countQuery() {
|
514 |
|
|
// Clone the inner query.
|
515 |
|
|
$inner = clone $this->query;
|
516 |
|
|
|
517 |
|
|
// Add conditions to query.
|
518 |
|
|
$inner->join('search_dataset', 'd', 'i.sid = d.sid AND i.type = d.type');
|
519 |
|
|
$inner->condition($this->conditions);
|
520 |
|
|
|
521 |
|
|
// Remove existing fields and expressions, they are not needed for a count
|
522 |
|
|
// query.
|
523 |
|
|
$fields =& $inner->getFields();
|
524 |
|
|
$fields = array();
|
525 |
|
|
$expressions =& $inner->getExpressions();
|
526 |
|
|
$expressions = array();
|
527 |
|
|
|
528 |
|
|
// Add the sid as the only field and count them as a subquery.
|
529 |
|
|
$count = db_select($inner->fields('i', array('sid')), NULL, array('target' => 'slave'));
|
530 |
|
|
|
531 |
|
|
// Add the COUNT() expression.
|
532 |
|
|
$count->addExpression('COUNT(*)');
|
533 |
|
|
|
534 |
|
|
return $count;
|
535 |
|
|
}
|
536 |
|
|
} |