NAME

DBIx::EAV::Cursor - Represents a query used for fetching entities.

SYNOPSIS

# get cursor from resultset
my $cursor = $eav->resultset('CD')->search(\%query)->cursor;

while (my $cd = $cursor->next) {

    # $cd is the raw hashref returned from database
    printf "CD id: %d\n", $cd->{id};
}

DESCRIPTION

A cursor is used to build, execute and iterate over a SQL query for the entities table. A a cursor instance is returned from find and from get (when you get() related data). You will never need to create a instance of this class yourself.

METHODS

all

Arguments: none

Return Value: @entities

Returns all entities in the result.

next

Arguments: none

Return Value: $result | undef

Returns the next element in the resultset (undef if there is none).

Can be used to efficiently iterate over records in the resultset:

my $cursor = $eav->resultset('CD')->find;
while (my $cd = $cursor->next) {
  print $cd->get('title');
}

Note that you need to store the cursor object, and call next on it. Calling resultset('CD')->next repeatedly will always return the first record from the cursor.

first

Arguments: none

Return Value: $result | undef

Resets the cursor (causing a fresh query to storage) and returns an object for the first result (or undef if the resultset is empty).

reset

Deletes the current statement handle, if any. Next data fetching will trigger a new database query.

LICENSE

Copyright (C) Carlos Fernando Avila Gratz.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

Carlos Fernando Avila Gratz <cafe@kreato.com.br>