Php 带分页的Laravel困难联合查询
我有这些表，可能在mysql或postgres数据库中： |===============================================================================| | articles | |===============================================================================| |id|user_id|state| title |text|created_at|updated_at|abstract|image| |==|=======|=====|====================|====|==========|==========|========|=====| |1 | 1 | 5 |L'hopital rule |... |2014-12-05| | ... | ... | |2 | 2 | 5 |Gaussian quadrature |... |2012-11-13|2014-12-05| ... | ... | |3 | 2 | 5 |Gauss elimination |... |2013-07-18|2014-03-09| ... | ... | |4 | 3 | 5 |Plant cell structure|... |2013-09-10|2013-12-15| ... | ... | |5 | 4 | 5 |Game theory |... |2011-02-15|2012-11-30| ... | ... | | . . . | |===============================================================================| |===========| |====================| |===========| | tag_groups| | tags | | users | |===========| |====================| |===========| |id| name | |id|id_article|id_tag| |id| name | |==|========| |==|==========|======| |==|========| |1 |Math | |1 | 1 | 1 | |1 |Tom Ther| |2 |Calculus| |2 | 1 | 2 | |2 |May Nick| |3 |Gradient| |3 | 2 | 1 | |3 |Math Ria| |4 |Geometry| |4 | 3 | 1 | |4 |Gauss Li| | . . . | | . . . | | . . . | |===========| |====================| |===========|Php 带分页的Laravel困难联合查询,php,sql,laravel,eloquent,union,Php,Sql,Laravel,Eloquent,Union,我有这些表，可能在mysql或postgres数据库中： |===============================================================================| | articles | |========================================================
function like($string, $escape_char = '\\') {
return str_replace(
array($escape_char, '_', '%'),
array($escape_char.$escape_char, $escape_char.'_', $escape_char.'%'),
$string
);
}
function wild($string) {
return DB::connection()->getPdo()->quote('%'.like($string).'%');
}
function build_sql($quoted_query) {
return "
SELECT DISTINCT
articles.id, articles.user_id, articles.state, articles.title,
articles.image, articles.abstract, articles.text, articles.created_at,
articles.updated_at
FROM (
SELECT articles.*, ord
FROM (
SELECT articles.*, 1 ord
FROM articles
LEFT JOIN tags ON tags.id_article = articles.id
LEFT JOIN tag_groups ON tags.id_tag = tag_groups.id
WHERE articles.state = 5 AND tag_groups.name ILIKE $quoted_query
UNION
SELECT articles.*, 2 ord
FROM articles
WHERE articles.state = 5 AND articles.title ILIKE $quoted_query
UNION
SELECT articles.*, 3 ord
FROM articles
LEFT JOIN users ON users.id = articles.user_id
WHERE articles.state = 5 AND users.name ILIKE $quoted_query
UNION
SELECT articles.*, 4 ord
FROM articles
WHERE articles.state = 5 AND articles.text ILIKE $quoted_query
) articles
ORDER BY ord ASC, articles.updated_at DESC
) articles;
"
}
$articles = DB::table((DB::raw($build_sql(wild($_query)))))->distinct();
$maxPages = ceil(count($articles->get()) / 9);
return View::make('index', array(
'articles' => $articles->simplePaginate(9),
'maxPages' => $maxPages,
));
function like($string, $escape_char = '\\') {
return str_replace(
array($escape_char, '_', '%'),
array($escape_char.$escape_char, $escape_char.'_', $escape_char.'%'),
$string
);
}
function wild($string) {
return DB::connection()->getPdo()->quote('%'.like($string).'%');
}
function build_sql($quoted_query) {
return "
SELECT DISTINCT
articles.id, articles.user_id, articles.state, articles.title,
articles.image, articles.abstract, articles.text, articles.created_at,
articles.updated_at
FROM (
SELECT articles.*, ord
FROM (
SELECT articles.*, 1 ord
FROM articles
LEFT JOIN tags ON tags.id_article = articles.id
LEFT JOIN tag_groups ON tags.id_tag = tag_groups.id
WHERE articles.state = 5 AND tag_groups.name ILIKE $quoted_query
UNION
SELECT articles.*, 2 ord
FROM articles
WHERE articles.state = 5 AND articles.title ILIKE $quoted_query
UNION
SELECT articles.*, 3 ord
FROM articles
LEFT JOIN users ON users.id = articles.user_id
WHERE articles.state = 5 AND users.name ILIKE $quoted_query
UNION
SELECT articles.*, 4 ord
FROM articles
WHERE articles.state = 5 AND articles.text ILIKE $quoted_query
) articles
ORDER BY ord ASC, articles.updated_at DESC
) articles;
"
}
$articles = DB::table((DB::raw($build_sql(wild($_query)))))->distinct();
$maxPages = ceil(count($articles->get()) / 9);
return View::make('index', array(
'articles' => $articles->simplePaginate(9),
'maxPages' => $maxPages,
));