Add support for Microsoft SQL

src/Searchable.php

@@ -71,13 +71,14 @@ trait Searchable
  *
  * @param \Illuminate\Database\Eloquent\Builder $query
  * @param string $search
+ * @param int $limit
  * @param string|null|Closure $restriction
  *
  * @return \Illuminate\Database\Eloquent\Builder
  *
  * @see search()
  */
- public function scopeSearch(Builder $query, $search, $restriction = null)
+ public function scopeSearch(Builder $query, $search, $limit = 25, $restriction = null)
  {
  $this->searchable = $this->toSearchableArray();
 
@@ -110,7 +111,7 @@ public function scopeSearch(Builder $query, $search, $restriction = null)
  }
 
  $this->addSelectsToQuery($cloned_query, $selects);
- $this->filterQueryWithRelevance($cloned_query, $relevance_count);
+ $this->filterQueryWithRelevance($cloned_query, $relevance_count, $limit);
  $this->makeGroupBy($cloned_query);
 
  if ($restriction instanceof Closure) {
@@ -126,6 +127,10 @@ public function scopeSearch(Builder $query, $search, $restriction = null)
 
  $this->mergeQueries($cloned_query, $query);
 
+ if ($this->getDatabaseDriver() === 'sqlsrv') {
+ $query->whereRaw('CAST(relevance AS NUMERIC(10,2)) >= ' . number_format($this->threshold, 2, '.', ''));
+ }
+
  return $query;
  }
 
@@ -224,7 +229,7 @@ protected function getMatchers()
  unset($matchers['exactFullMatcher'], $matchers['exactInStringMatcher']);
  }
 
- if ($this->getDatabaseDriver() === 'sqlite') {
+ if (in_array($this->getDatabaseDriver(), ['sqlite', 'sqlsrv'], true)) {
  unset($matchers['similarStringMatcher']);
  }
 
@@ -243,6 +248,20 @@ protected function getDatabaseDriver()
  return config('database.connections.' . $key . '.driver');
  }
 
+ /**
+ * Returns the delimiter to use for the current database driver.
+ *
+ * @return string
+ */
+ protected function getDelimiter()
+ {
+ if ($this->getDatabaseDriver() === 'sqlsrv') {
+ return '"';
+ }
+
+ return '`';
+ }
+
  /**
  * Returns the search columns.
  *
@@ -347,7 +366,7 @@ protected function getSearchQuery($column, $relevance)
  */
  protected function createMatcher($column, $relevance)
  {
- $formatted = '`' . str_replace('.', '`.`', $column) . '`';
+ $formatted = $this->getDelimiter() . str_replace('.', "{$this->getDelimiter()}.{$this->getDelimiter()}", $column) . $this->getDelimiter();
 
  if (isset($this->searchable['mutations'][$column])) {
  $formatted = $this->searchable['mutations'][$column] . '(' . $formatted . ')';
@@ -406,9 +425,9 @@ protected function getFullTextColumns()
  protected function fullTextMatcher($column, $relevance)
  {
  $this->search_bindings[] = implode(' ', $this->orderedWords);
- $column = str_replace('.', '`.`', $column);
+ $column = str_replace('.', "{$this->getDelimiter()}.{$this->getDelimiter()}", $column);
 
- $this->matcherQuery = "(MATCH(`$column`) AGAINST (?) * $relevance * 2)";
+ $this->matcherQuery = "(MATCH({$this->getDelimiter()}$column{$this->getDelimiter()}) AGAINST (?) * $relevance * 2)";
  }
 
  /**
@@ -427,12 +446,20 @@ protected function addSelectsToQuery(Builder $query, array $selects)
  *
  * @param \Illuminate\Database\Eloquent\Builder $query
  * @param int $relevance_count
+ * @param int|null $limit
  */
- protected function filterQueryWithRelevance(Builder $query, $relevance_count)
+ protected function filterQueryWithRelevance(Builder $query, $relevance_count, $limit)
  {
+ if ($limit === null) {
+ $limit = 25;
+ }
+
  $this->threshold = $relevance_count * (count($this->getColumns()) / 6) * (count($this->getMatchers()) / 6);
 
- $query->havingRaw('relevance >= ' . number_format($this->threshold, 2, '.', ''));
+ $query->limit($limit);
+ if ($this->getDatabaseDriver() !== 'sqlsrv') {
+ $query->havingRaw('relevance >= ' . number_format($this->threshold, 2, '.', ''));
+ }
  $query->orderBy('relevance', 'desc');
  }
 
@@ -443,6 +470,10 @@ protected function filterQueryWithRelevance(Builder $query, $relevance_count)
  */
  protected function makeGroupBy(Builder $query)
  {
+ if ($this->getDatabaseDriver() === 'sqlsrv') {
+ return;
+ }
+
  if ($groupBy = $this->getGroupBy()) {
  $query->groupBy($groupBy);
  } else {
@@ -562,9 +593,9 @@ protected function consecutiveCharactersMatcher($query, $column, $relevance)
  $this->searchString = '%' . implode('%', str_split(preg_replace('/[^0-9a-zA-Z]/', '', $query))) . '%';
  $this->search_bindings[] = $this->searchString;
  $this->search_bindings[] = $query;
- $column = str_replace('.', '`.`', $column);
+ $column = str_replace('.', "{$this->getDelimiter()}.{$this->getDelimiter()}", $column);
 
- $this->matcherQuery = "CASE WHEN REPLACE(`$column`, '\.', '') $this->operator ? THEN ROUND($relevance * ( {$this->getLengthMethod()}( ? ) / {$this->getLengthMethod()}( REPLACE(`$column`, ' ', '') ))) ELSE 0 END";
+ $this->matcherQuery = "CASE WHEN REPLACE({$this->getDelimiter()}$column{$this->getDelimiter()}, '\.', '') $this->operator ? THEN ROUND($relevance * ( {$this->getLengthMethod()}( ? ) / {$this->getLengthMethod()}( REPLACE({$this->getDelimiter()}$column{$this->getDelimiter()}, ' ', '') )), 0) ELSE 0 END";
  }
 
  /**
@@ -578,6 +609,10 @@ protected function getLengthMethod()
  return 'LENGTH';
  }
 
+ if ($this->getDatabaseDriver() === 'sqlsrv') {
+ return 'LEN';
+ }
+
  return 'CHAR_LENGTH';
  }
 
@@ -626,9 +661,9 @@ protected function timesInStringMatcher($query, $column, $relevance)
  {
  $this->search_bindings[] = $query;
  $this->search_bindings[] = $query;
- $column = str_replace('.', '`.`', $column);
+ $column = str_replace('.', "{$this->getDelimiter()}.{$this->getDelimiter()}", $column);
 
- $this->matcherQuery = "($relevance * ROUND(({$this->getLengthMethod()}(COALESCE(`$column`, '')) - {$this->getLengthMethod()}( REPLACE( LOWER(COALESCE(`$column`, '')), lower(?), ''))) / LENGTH(?)))";
+ $this->matcherQuery = "($relevance * ROUND(({$this->getLengthMethod()}(COALESCE({$this->getDelimiter()}$column{$this->getDelimiter()}, '')) - {$this->getLengthMethod()}( REPLACE( LOWER(COALESCE({$this->getDelimiter()}$column{$this->getDelimiter()}, '')), lower(?), ''))) / {$this->getLengthMethod()}(?), 0))";
  }
 
  /**