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Al Newkirk

NAME

Doodle

ABSTRACT

Database DDL (= Data Definition Language) Statement Builder

SYNOPSIS

  use Doodle;

  my $self = Doodle->new;
  my $table = $self->table('users');

  $table->primary('id');
  $table->uuid('arid');
  $table->column('name');
  $table->string('email');
  $table->json('metadata');

  my $command = $table->create;
  my $grammar = $self->grammar('sqlite');
  my $statement = $grammar->execute($command);

  # say $statement->sql;

  # create table "users" (
  #   "id" integer primary key,
  #   "arid" varchar,
  #   "name" varchar,
  #   "email" varchar,
  #   "metadata" text
  # )

DESCRIPTION

Doodle is a database DDL ("Data Definition Language" or "Data Description Language") statement builder and provides an object-oriented abstraction for performing schema changes in various datastores. This class consumes the Doodle::Helpers roles.

INTEGRATES

This package integrates behaviors from:

Doodle::Helpers

LIBRARIES

This package uses type constraints from:

Doodle::Library

ATTRIBUTES

This package has the following attributes:

commands

  commands(Commands)

This attribute is read-only, accepts (Commands) values, and is optional.

METHODS

This package implements the following methods:

build

  build(Grammar $grammar, CodeRef $callback) : Any

Execute a given callback for each generated SQL statement.

build example #1
  # given: synopsis

  $self->build($grammar, sub {
    my $statement = shift;

    # e.g. $db->do($statement->sql);
  });

grammar

  grammar(Str $name) : Grammar

Returns a new Grammar object.

grammar example #1
  # given: synopsis

  my $type = 'sqlite';

  $grammar = $self->grammar($type);

schema

  schema(Str $name, Any %args) : Schema

Returns a new Schema object.

schema example #1
  # given: synopsis

  my $name = 'app';

  my $schema = $self->schema($name);

statements

  statements(Grammar $g) : Statements

Returns a set of Statement objects for the given grammar.

statements example #1
  # given: synopsis

  my $statements = $self->statements($grammar);

table

  table(Str $name, Any %args) : Table

Return a new Table object.

table example #1
  # given: synopsis

  my $name = 'users';

  $table = $self->table($name);

AUTHOR

Al Newkirk, awncorp@cpan.org

LICENSE

Copyright (C) 2011-2019, Al Newkirk, et al.

This is free software; you can redistribute it and/or modify it under the terms of the The Apache License, Version 2.0, as elucidated in the "license file".

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