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我有学生订购的信息数据存储在数据库中。我想通过从日期和时间选择的下拉菜单来搜索这些订单。通常，我可以搜索数据库中的所有数据，但当我选择下拉列表从日期和时间选项时无法工作。

我的文件在下面：

SrchList.html.ep

    <%
    my $SrchResult = stash('SrchResult');
    my $Date = stash('Date');
    my @Date =(['--' => '']);
    foreach my $key (sort keys %{$Date}){     
        push(@Date, ($Date->{$key}->{name}) => $key);
    }
    my $Time = stash('Time');
    my @Time =(['--' => '']);
    for(my $i = 1; $i <= $Time->{max}; $i++){ 
        push(@Time, [$i.'H' => $i]);
    }
%>
<form action="<%= url_for('/SrchList') %>" method="post" class="form-horizontal frmSrchList">
    <div class="row">
        <div class="col-lg-10 col-lg-offset-1">
            <div class="input-group">Order Start<%= select_field 'Date'=>\@Date, class=>'form-control', id=>'Date_start' %></div>
            <div class="input-group">Time Start<%= select_field 'Time'=>\@Time, class=>'form-control', id=>'Time_start' %></div>
            <div> ~ </div>
            <div class="input-group">Order End<%= select_field 'Date'=>\@Date, class=>'form-control', id=>'Date_end' %></div>
            <div class="input-group">Time End<%= select_field 'Time'=>\@Time, class=>'form-control', id=>'Time_end' %></div>
        </div>
        <div class="col-lg-10 col-lg-offset-1">
                <button type="submit" class="btn btn-success">Search</button>
        </div>
    </div>
    <div class="row"><table class="table table-striped">
            <thead><tr><th>recptid</th><th>student_id</th><th>price</th><th>total</th><th>upd_date</th></tr></thead>
            <tbody >
                % foreach my $reserve_id (sort {$b <=> $a} keys %{$SrchResult}){
                % $SrchResult->{$reserve_id}->{upd_date} =~ /(\d{4})\-(\d{2})\-(\d{2}) (\d{2}):(\d{2}):(\d{2})/;
                % $SrchResult->{$reserve_id}->{price} =~ s/\,/<br>/g;
                <tr>
                    <td><%= uc($SrchResult->{$reserve_id}->{recptid}) %></td>
                    <td><%= uc($SrchResult->{$reserve_id}->{student_id}) %></td>
                    <td align="right"> <%== decode('utf-8', $SrchResult->{$reserve_id}->{price}) %> </td>
                    <td align="center"> <%== decode('utf-8', $SrchResult->{$reserve_id}->{total})  %></td>
                    <td> <%= decode('utf-8', $SrchResult->{$reserve_id}->{upd_date}) %> </td>
                </tr>% }
            </tbody>
    </table></div>
</form>

索引.cgi

get '/SrchList'=>{page => undef} => sub {
    my $self = shift;
    my @breadcrumb = ('SrchList');
    $self->stash('breadcrumb'=> \@breadcrumb);
    my $Date = $TextBookCommon->GetDate();
    $self->stash('Date' => $Date);
    $self->stash('Time' => $TextBookCommon->{'CONFIG'}->{'SELECT'}->{'Time'});
    $session->clear('_SRCH_DATA');
    $self->render('SrchList');
};
post '/SrchList/:page' => {page => undef} => sub {
    my $self = shift;
    my @breadcrumb = ('SrchList');
    $self->stash('breadcrumb'=> \@breadcrumb);
    my %SRCH_DATA = (defined $session->param('_SRCH_DATA') ? %{$session->param('_SRCH_DATA')} : '');
    my $Date;
    my $Time;
    if(! defined $self->param('return')){
        $Date = ($self->param('Date') ne ''  ? $self->param('Date') : $Date);
        $Time = ($self->param('Time') ne ''  ? $self->param('Time') : $Time);
    } else {
        $Date = (exists($SRCH_DATA{'Date'}) ?  $SRCH_DATA{'Date'} : '');
        $Time = (exists($SRCH_DATA{'Time'}) ?  $SRCH_DATA{'Time'} : '');
    }
    my $SrchData = {
        'Date' => $Date,
        'Time' => $Time
    } ;
    my $DateData = $TextBookCommon->GetDate();
    $session->param(-name=>'_SRCH_DATA', -value=>$SrchData);
    my $SrchResult = $TextBookCommon->GetOrderSearch($SrchData);
    $self->stash('Date' => $DateData);
    $self->stash('Time' => $TextBookCommon->{'CONFIG'}->{'SELECT'}->{'Time'});
    $self->stash('SrchResult'=> $SrchResult);
    $self->stash('SrchData'=> $SrchData);
    $self->stash('TextBookCommon' => $TextBookCommon);
    $self->render('SrchList');
};

索引.cgi.conf

{
    'SELECT' => {  
        'Time' =>{   
                    'max' => 24                                               
                },
    },
}

TextBookCommon.pm

sub CreateOrderSearchSQL(){
    my $self = shift;
    my $StudentData = shift;
    my $Date_start = $StudentData->{Date_start};
    my $Time_start = $StudentData->{Time_start};
    my $Date_end = $StudentData->{Date_end};
    my $Time_end = $StudentData->{Time_end};
    my $sql;
    my $dbh = $self->{'dbh'};
    my $data = '';
    my @param = ();
    $sql =<<"   SQL_EOL";
            SELECT tr.reserve_id, tr.recptid, tr.student_id, GROUP_CONCAT(tr.price) AS 'price', 
                   SUM(tr.price)+1000 AS 'total', tr.upd_date AS 'upd_date'
            FROM 
                ( SELECT ra.reserve_id, RIGHT(ra.reserve_id,5) AS recptid,
                m.student_id, rb.price, rb.upd_date FROM t_reserve_a AS ra 
                INNER JOIN t_reserve_b AS rb ON ra.reserve_id=rb.reserve_id
                INNER JOIN m_student AS m ON m.student_id=ra.student_id ) AS tr
            GROUP BY tr.reserve_id
    SQL_EOL
    if($Date_start ne '' ||  $Date_end ne ''){
        $sql .="and WHERE DATE(t_reserve_a.upd_date) BETWEEN DATE(t_reserve_a.upd_date) = ? AND DATE(t_reserve_a.upd_date) =?";
        push(@param, $Date_start, $Date_end);
    }
    if($Time_start ne '' ||  $Time_end ne ''){
        $sql .="and WHERE TIME(t_reserve_a.upd_date) BETWEEN TIME(t_reserve_a.upd_date) = ? AND TIME(t_reserve_a.upd_date) = ? ";
        push(@param, $Date_start, $Date_end);
    }
    my $result = {
        'sql' =>  $sql,
        'param' => \@param,
    };
    return $result;
}
sub GetOrderSearch(){
    my $self = shift;
    my $StudentData = shift;
    my $result = $self->CreateOrderSearchSQL($StudentData);
    my $sql = $result->{'sql'};
    my @param = @{$result->{'param'}};
    $sql .= " order by tr.reserve_id ";
    my $SrchResult = $dbh->selectall_hashref($sql,'reserve_id',undef, @param);
    return $SrchResult;
}

谁能帮我解决这个问题？

4

1 回答 1

2

你的 SQL 看起来不对。您WHERE在GROUP BY. 这是一个 SQL 语法错误。本质上，您正在生成这样的 SQL：

SELECT * FROM foo GROUP BY id AND WHERE bar = 1;

这将引发类似于

SQL 错误 (1064)：您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册，以在第 1 行的“WHERE bar = 1”附近使用正确的语法

我们看不到您$dbh的创建位置，但我假设您没有错误检查。您$dbh甚至在GetOrderSearch. 您在构建 SQL 并且从不使用它的另一种方法中取出$self它，但不是在您实际运行查询的地方，因此您的代码可能根本无法编译。

在任何情况下，您都应该重新安排 SQL 代码的创建并将其分解为多个步骤。

my $sql = 'SELECT * FROM foo';

my @where, @args;
if ($some_condition) {
  push @where, 'foo BETWEEN ? AND ?';
  push @args, $datetime_from, $datetime_to;
}

if ($another_condition) {
  push @where, 'id > ?';
  push @args, $id;
}

if (@where) {
 $sql .= ' WHERE ' . join( ' AND ', @where);
}

$sql .= ' GROUP BY id';

这样，SQL 将按正确的顺序排列。

将来，当您的 SQL 不工作时，将其调试到您的服务器日志中并针对您的 mysql 服务器手动运行它以查看发生了什么。

于 2020-08-14T10:30:01.960 回答