Yuki Kimoto > DBIx-Custom-0.27 > DBIx::Custom::Where

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Source   Latest Release: DBIx-Custom-0.30

NAME ^

DBIx::Custom::Where - Where clause

SYNOPSYS ^

  # Create DBIx::Custom::Where object
  my $where = $dbi->where;
  
  # Clause
  $where->clause(['and', 'title like :title', 'price = :price']);
  $where->clause(['and', ':title{like}', ':price{=}']);
  
  # Stringify where clause
  my $where_clause = "$where";
  my $where_clause = $where->to_string;
    # -> where title like :title and price = :price
  
  # Only price condition
  $where->clause(['and', ':title{like}', ':price{=}']);
  $where->param({price => 1900});
    # -> where price = :price
  
  # Only title condition
  $where->clause(['and', ':title{like}', ':price{=}']);
  $where->param({title => 'Perl'});
    # -> where title like :title
  
  # Nothing
  $where->clause(['and', ':title{like}', ':price{=}']);
  $where->param({});
    # => Nothing
  
  # or condition
  $where->clause(['or', ':title{like}', ':price{=}']);
    # -> where title = :title or price like :price
  
  # More than one parameter
  $where->clause(['and', ':price{>}', ':price{<}']);
  $where->param({price => [1000, 2000]});
    # -> where price > :price and price < :price
  
  # Only first condition
  $where->clause(['and', ':price{>}', ':price{<}']);
  $where->param({price => [1000, $dbi->not_exists]});
    # -> where price > :price
  
  # Only second condition
  $where->clause(['and', ':price{>}', ':price{<}']);
  $where->param({price => [$dbi->not_exists, 2000]});
    # -> where price < :price
  
  # More complex condition
  $where->clause(
    [
      'and',
      ':price{=}',
      ['or', ':title{=}', ':title{=}', ':title{=}']
    ]
  );
    # -> pirce = :price and (title = :title or title = :title or tilte = :title)
  
  # Using Full-qualified column name
  $where->clause(['and', ':book.title{like}', ':book.price{=}']);
    # -> book.title like :book.title and book.price = :book.price

ATTRIBUTES ^

clause

  my $clause = $where->clause;
  $where = $where->clause(
    ['and',
      ':title{=}', 
      ['or', ':date{<}', ':date{>}']
    ]
  );

Where clause. Above one is expanded to the following SQL by to_string If all parameter names is exists.

  where title = :title and ( date < :date or date > :date )

param

  my $param = $where->param;
  $where = $where->param({
    title => 'Perl',
    date => ['2010-11-11', '2011-03-05'],
  });

dbi

  my $dbi = $where->dbi;
  $where = $where->dbi($dbi);

DBIx::Custom object.

METHODS ^

DBIx::Custom::Where inherits all methods from Object::Simple and implements the following new ones.

to_string

  $where->to_string;

Convert where clause to string.

double quote is override to execute to_string method.

  my $string_where = "$where";
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