我正在使用Web框架Catalyst，并且想使用Data::Paginator插件对Elasticsearch查询的结果进行分页。现在是我的代码:
Root.pm
sub search :Global {
my ( $self, $c ) = @_;
my $search = $c->model('Search');
my $m = $c->req->params->{m};
my $from = 0;
my $size = 10;
my $results = $search->search(
index => 'index1',
type => 'type1',
body => {
query => {
prefix => { entree => $m }
},
from => $from,
size => $size
}
);
my $pager = Data::Paginator->new(
current_page => 1,
entries_per_page => 10,
total_entries => $results->{hits}{total},
);
my $p = { next_page=>$pager->next_page, previous_page=>$pager->previous_page };
my @res=();
for my $i ( @{ $results->{hits}->{hits} } ) {
my $h = { entree => $i->{_source}->{entree}, contenu => $i->{_source}->{contenu} };
push @res, $h;
}
$c->stash(template => 'search.tt', total => $results->{hits}{total}, m=>$m , res=>\@res, pager=>$p);
$c->forward('View::HTML');
}
还有模板
search.tt
<!DOCTYPE html>
<html lang="fr">
<head>
<meta charset="utf-8">
<title>Résultats</title>
</head>
<body>
<h1>[% total %] résultat(s) pour [% m %]</h1>
[% IF total >0 %]
[% FOREACH h IN res %]
<h2>[% h.entree %]</h2>
<p>[% h.contenu %]</p>
[% END %]
[% ELSE %]
<p>Pas de résultat</p>
[% END %]
</body>
<footer>
<a href="/">Nouvelle recherche</a>
<a href="/search?offset=[% pager.previous_page %]&m=[% m %]">Previous Page</a>
<a href="/search?offset=[% pager.next_page %]&m=[% m %]">Next Page</a>
<a> DATA PAGINATOR TEST [% pager %]</a>
</footer>
</html>
当我单击“下一页”或“上一页”并显示新结果时，我想通过elasticsearch进行新查询:
my $results = $search->search(
index => 'index1',
type => 'type1',
body => {
query => {
prefix => { entree => $m }
},
from => $from + 10,
OR from => $from -10,
size => $size
}
);
谢谢一些关于如何做到这一点的提示。
编辑1:
Root_v2.pm
sub search :Global {
my ( $self, $c ) = @_;
my $search = $c->model('Search');
my $m = $c->req->params->{m};
my $offset = $c->req->params->{offset} ? $c->req->params->{offset} : 0;
my $from = 0;
my $size = 10;
my $results = $search->search(
index => 'index1',
type => 'type1',
body => {
query => {
prefix => { entree => $m }
},
from => $offset*$size,
size => $size
}
);
my $pager = Data::Paginator->new(
current_page => $offset,
entries_per_page => 10,
total_entries => $results->{hits}{total},
);
my $p = { next_page=>$pager->next_page, previous_page=>$pager->previous_page };
my @res=();
for my $i ( @{ $results->{hits}->{hits} } ) {
my $h = { entree => $i->{_source}->{entree}, contenu => $i->{_source}->{contenu} };
push @res, $h;
}
$c->stash(template => 'search.tt', total => $results->{hits}{total}, m=>$m , res=>\@res, pager=>$p);
$c->forward('View::HTML');
}
我从search.tt文件中的href获得偏移量，并用它来修改elasticsearch查询中的“from”参数。
但是我对Data::Paginator中的“current_page”有疑问:即使我的$ offset等于0本身，它也永远不会等于0(请参阅current_page => $ offset)。第一次单击下一页时，我错过了第10至20个结果。
行为是这样的:
Click on search button: OFFSET=0 / CURRENT_PAGE=1 / NEXT_PAGE=2 / PREVIOUS_PAGE=not def
Click on next page button: OFFSET=2 / CURRENT_PAGE=2 / NEXT_PAGE=3 / PREVIOUS_PAGE=1
Click on previous page button: OFFSET=1 / CURRENT_PAGE=1 / NEXT_PAGE=2 / PREVIOUS_PAGE=not def
您会看到我第一次单击下一页按钮时错过了结果，这是因为我的偏移量直接从0跳到2跳过了1。
编辑2
Root_v3.pm
修改内容:
my $offset = $c->req->params->{offset} ? $c->req->params->{offset} : O;
▼▼▼
my $offset = $c->req->params->{offset} ? $c->req->params->{offset} : 1;
和
from => $offset*$size,
▼▼▼
from => ($offset-1)*$size,
现在可以了!
最佳答案
看到我所做的两个编辑的原始帖子。
关于perl - 如何使用Elasticsearch在Catalyst应用程序中进行分页？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/49755931/