Question

use lib '/var/www/Employees';

use DBConnect::DBConnect qw(getSchemaConnection);

BEGIN { $ENV{DBIC_TRACE} = 1 }

$schema = getSchemaConnection();

$salaries = $schema->resultset('Salary')->search(

{   
    'employees.emp_no'=>100000  
},

{
  join =>'employees'

}

);

print $emplyees->count;

我有两个员工和薪水，薪水是belongs_to员工我喜欢用雇员表中的员工编号搜索薪水

当我尝试运行它时，我收到以下错误

DBIx::Class::ResultSource::_resolve_join(): No such relationship employees on Salary at /var/www/Employees/Testing/3_simpleJoin.pl line 29

这是我的calsses：

薪酬：

package DAO::Schema::Result::Salary;

# Created by DBIx::Class::Schema::Loader
# DO NOT MODIFY THE FIRST PART OF THIS FILE

use strict;
use warnings;

use base 'DBIx::Class::Core';

__PACKAGE__->add_columns(
  "emp_no",
  { data_type => "integer", is_foreign_key => 1, is_nullable => 0 },
  "salary",
  { data_type => "integer", is_nullable => 0 },
  "from_date",
  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 0 },
  "to_date",
  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 0 },
);
__PACKAGE__->set_primary_key("emp_no", "from_date");

__PACKAGE__->belongs_to(
  "emp_no",
  "DAO::Schema::Result::Employee",
  { emp_no => "emp_no" },
  { is_deferrable => 1, on_delete => "CASCADE", on_update => "CASCADE" },
);


1;

这是我的员工类

package DAO::Schema::Result::Employee;

# Created by DBIx::Class::Schema::Loader
# DO NOT MODIFY THE FIRST PART OF THIS FILE

use strict;
use warnings;

use base 'DBIx::Class::Core';

__PACKAGE__->add_columns(
  "emp_no",
  { data_type => "integer", is_nullable => 0 },
  "birth_date",
  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 0 },
  "first_name",
  { data_type => "varchar", is_nullable => 0, size => 14 },
  "last_name",
  { data_type => "varchar", is_nullable => 0, size => 16 },
  "gender",
  { data_type => "enum", extra => { list => ["M", "F"] }, is_nullable => 0 },
  "hire_date",
  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 0 },
);
__PACKAGE__->set_primary_key("emp_no");

__PACKAGE__->has_many(
  "salaries",
  "DAO::Schema::Result::Salary",
  { "foreign.emp_no" => "self.emp_no" },
  { cascade_copy => 0, cascade_delete => 0 },
);

__PACKAGE__->has_many(
  "titles",
  "DAO::Schema::Result::Title",
  { "foreign.emp_no" => "self.emp_no" },
  { cascade_copy => 0, cascade_delete => 0 },
);

1;

Answer 1

从那个错误中，我猜你没有在你的Result类中为Salary定义关系。看看the manual for DBIC Relationships，如果这没有帮助，请使用结果类更新您的问题。

更新：你已经在Salary中定义了关系。您的join行不正确，请将其更改为join => 'emp_no'，这样可以解决错误。

Answer 2

尝试定义belongs_to的{{1}}关系，如下所示：

Salary

然后，在您的主脚本中：

__PACKAGE__->belongs_to(
  "employee",  # was "emp_no"
  "DAO::Schema::Result::Employee",
  "emp_no",    # was a wrong condition
  { is_deferrable => 1, on_delete => "CASCADE", on_update => "CASCADE" },
);

另外，请帮自己一个忙，并始终使用my $salaries = $schema->resultset('Salary')->search({ 'employee.emp_no' => 100000, # was "employees" }, { join => 'employee', # was "employees" }); print $salaries->count;。

DBIx :: Class :: ResultSource :: _ resolve_join（）：没有这样的关系

2 个答案: