Red
Take a look at our Documentation: https://fco.github.io/Red/
Red - A WiP ORM for Raku
INSTALL
Install with (you need rakudo 2018.12-94-g495ac7c00 or newer):
zef install Red
SYNOPSIS
use Red:api<2>;
model Person {...}
model Post is rw {
has Int $.id is serial;
has Int $!author-id is referencing( *.id, :model(Person) );
has Str $.title is column{ :unique };
has Str $.body is column;
has Person $.author is relationship{ .author-id };
has Bool $.deleted is column = False;
has DateTime $.created is column .= now;
has Set $.tags is column{
:type<string>,
:deflate{ .keys.join: "," },
:inflate{ set(.split: ",") }
} = set();
method delete { $!deleted = True; self.^save }
}
model Person is rw {
has Int $.id is serial;
has Str $.name is column;
has Post @.posts is relationship{ .author-id };
method active-posts { @!posts.grep: not *.deleted }
}
my $*RED-DB = database "SQLite";
Person.^create-table;
-- Equivalent to the following query:
CREATE TABLE person(
id integer NOT NULL primary key
AUTOINCREMENT,
name varchar(255) NOT NULL
)
Post.^create-table;
-- Equivalent to the following query:
CREATE TABLE post(
id integer NOT NULL primary key AUTOINCREMENT,
author_id integer NULL references person(id),
title varchar(255) NOT NULL,
body varchar(255) NOT NULL,
deleted integer NOT NULL,
created varchar(32) NOT NULL,
tags varchar(255) NOT NULL,
UNIQUE (title)
)
my Post $post1 = Post.^load: :42id;
-- Equivalent to the following query:
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
post.id = 42
my Post $post1 = Post.^load: 42;
-- Equivalent to the following query:
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
post.id = 42
my Post $post1 = Post.^load: :title("my title");
-- Equivalent to the following query:
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
post.title = ‘my title’
my $person = Person.^create: :name<Fernando>;
-- Equivalent to the following query:
INSERT INTO person(
name
)
VALUES(
?
)
-- BIND: ["Fernando"]
-- SQLite needs an extra select:
SELECT
person.id,
person.name
FROM
person
WHERE
_rowid_ = last_insert_rowid()
LIMIT 1
RETURNS:
Person.new(name => "Fernando")
# Using Pg Driver for this block
{
my $*RED-DB = database "Pg";
my $person = Person.^create: :name<Fernando>;
}
-- Equivalent to the following query:
INSERT INTO person(
name
)
VALUES(
$1
) RETURNING *
-- BIND: ["Fernando"]
RETURNS:
Person.new(name => "Fernando")
say $person.posts;
-- Equivalent to the following query:
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
post.author_id = ?
-- BIND: [1]
say Person.new(:2id)
.active-posts
.grep: { .created > now }
-- Equivalent to the following query:
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
(
post.author_id = ?
AND (
post.deleted == 0
OR post.deleted IS NULL
)
)
AND post.created > 1554246698.448671
-- BIND: [2]
my $now = now;
say Person.new(:3id)
.active-posts
.grep: { .created > $now }
-- Equivalent to the following query:
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
(
post.author_id = ?
AND (
post.deleted == 0
OR post.deleted IS NULL
)
)
AND post.created > ?
-- BIND: [
-- 3,
-- Instant.from-posix(
-- <399441421363/257>,
-- Bool::False
-- )
-- ]
Person.^create:
:name<Fernando>,
:posts[
{
:title("My new post"),
:body("A long post")
},
]
;
-- Equivalent to the following query:
INSERT INTO person(
name
)
VALUES(
?
)
-- BIND: ["Fernando"]
SELECT
person.id,
person.name
FROM
person
WHERE
_rowid_ = last_insert_rowid()
LIMIT 1
-- BIND: []
INSERT INTO post(
created,
title,
author_id,
tags,
deleted,
body
)
VALUES(
?,
?,
?,
?,
?,
?
)
-- BIND: [
-- "2019-04-02T22:55:13.658596+01:00",
-- "My new post",
-- 1,
-- "",
-- Bool::False,
-- "A long post"
-- ]
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
_rowid_ = last_insert_rowid()
LIMIT 1
my $post = Post.^load: :title("My new post");
-- Equivalent to the following query:
SELECT
post.id,
post.author_id as "author-id",
post.title,
post.body,
post.deleted,
post.created,
post.tags
FROM
post
WHERE
post.title = ‘My new post’
-- BIND: []
RETURNS:
Post.new(
title => "My new post",
body => "A long post",
deleted => 0,
created => DateTime.new(
2019,
4,
2,
23,
7,
46.677388,
:timezone(3600)
),
tags => Set.new("")
)
say $post.body;
PRINTS:
A long post
my $author = $post.author;
RETURNS:
Person.new(name => "Fernando")
$author.name = "John Doe";
$author.^save;
-- Equivalent to the following query:
UPDATE person SET
name = ‘John Doe’
WHERE id = 1
$author.posts.create:
:title("Second post"),
:body("Another long post");
-- Equivalent to the following query:
INSERT INTO post(
title,
body,
created,
tags,
deleted,
author_id
)
VALUES(
?,
?,
?,
?,
?,
?
)
-- BIND: [
-- "Second post",
-- "Another long post",
-- "2019-04-02T23:28:09.346442+01:00",
-- "",
-- Bool::False,
-- 1
-- ]
$author.posts.elems;
-- Equivalent to the following query:
SELECT
count(*) as "data_1"
FROM
post
WHERE
post.author_id = ?
-- BIND: [1]
RETURNS:
2
DESCRIPTION
Red is a WiP ORM for Raku.
traits
is column
is column{}
is id
is id{}
is serial
is referencing{}
is relationship{}
is table<>
is nullable
features:
relationships
Red will infer relationship data if you use type constraints on your properties.
# Single file e.g. Schema.pm6
model Related { ... }
# belongs to
model MyModel {
has Int $!related-id is referencing( *.id, :model<Related> );
has Related $.related is relationship{ .id };
}
# has one/has many
model Related {
has Int $.id is serial;
has MyModel @.my-models is relationship{ .related-id };
}
If you want to put your schema into multiple files, you can create an "indirect" relationship, and Red will look up the related models as necessary.
# MyModel.pm6
model MyModel {
has Int $!related-id is referencing{ :model<Related>, :column<id> };
has $.related is relationship({ .id }, :model<Related>);
}
# Related.pm6
model Related {
has Int $.id is serial;
has @.my-models is relationship({ .related-id }, :model<MyModel>);
}
If Red can’t find where your model is defined you can override where it looks with require:
has Int $!related-id is referencing{ :model<Related>, :column<id>,
:require<MyApp::Schema::Related> };
custom table name
model MyModel is table<custom_table_name> {}
not nullable columns by default
Red, by default, has not nullable columns, to change it:
#| This makes this model’s columns nullable by default
model MyModel is nullable {
has Int $.col1 is column; #= this column is nullable
has Int $.col2 is column{ :!nullable }; #= this one is not nullable
}
load object from database
MyModel.^load: 42;
MyModel.^load: id => 42;
save object on the database
$object.^save;
search for a list of object
Question.^all.grep: { .answer == 42 }; # returns a result seq
phasers
before-create
after-create
before-update
after-update
before-delete
after-delete
Temporary table
model Bla is temp { ... }
Create table
Question.^create-table;
Question.^create-table: :if-not-exists;
Question.^create-table: :unless-exists;
IN
Question.^all.grep: *.answer ⊂ (3.14, 13, 42)
create
Post.^create: :body("bla ble bli blo blu"), :title("qwer");
model Tree {
has UInt $!id is id;
has Str $.value is column;
has UInt $!parent-id is referencing{ Tree.id };
has Tree $.parent is relationship{ .parent-id };
has Tree @.kids is relationship{ .parent-id };
}
Tree.^create-table: :if-not-exists;
Tree.^create:
:value<Bla>,
:parent{:value<Ble>},
:kids[
{:value<Bli>},
{:value<Blo>},
{:value<Blu>}
]
;
AUTHOR
Fernando Correa de Oliveira fernandocorrea@gmail.com
COPYRIGHT AND LICENSE
Copyright 2018 Fernando Correa de Oliveira
This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.