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Sequel.html
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Sequel.html
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<html>
<head>
<link rel="Stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/cosmo/bootstrap.min.css" />
<title>Sequel</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.8.0/styles/default.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.8.0/highlight.min.js"></script>
<script>
window.onload = function() {
var allPre, i, j;
allPre = document.getElementsByTagName("pre");
for (i = 0, j = allPre.length; i < j; i++) {
hljs.highlightBlock(allPre[i]);
}
};
</script>
</head>
<body>
<a href="https://github.com/coisnepe/vimwiki_html" class="github-corner" aria-label="View source on Github"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a>
<a href="index.html">Index</a>
<hr>
<div class="container-fluid">
<div class="row">
<div class="col-md-12">
<div id="Sequel"><h2 id="Sequel">Sequel</h2></div>
<ul>
<li>
<a href="Sequel.html#Postgres">Postgres</a>
<li>
<a href="Sequel.html#Links">Links</a>
</ul>
<p>
<br />
</p>
<div id="Sequel-Links"><h3 id="Links">Links</h3></div>
<ul>
<li>
<a href="http://ricostacruz.com/cheatsheets/sequel.html">Sequel Cheatsheet</a>
<li>
<a href="https://github.com/jeremyevans/sequel">Github</a>
<li>
<a href="http://sequel.jeremyevans.net/documentation.html">Official documentation</a>
</ul>
<p>
<br />
</p>
<pre class="ruby">
# Filter dates
DB[:users].where { created_at > Date.today << 1 } # 1 month
DB[:users].where { created_at > (Date.today - 10) } # 10 days
# > WHERE created_at (`created_at` > '2016-12-11')
DB[:users].where(created_at: ((Date.today - 10)..(Date.today)))
</pre>
<pre class="ruby">
# Sequel.~ == NOT
# Sequel.& == AND
DB[:users].where { Sequel.~(login: nil, email: nil) }
# WHERE ((`login` IS NOT NULL) OR (`email` IS NOT NULL))
DB[:users].where { Sequel.&(login: nil, email: nil) }
DB[:users].exclude { Sequel.~(login: nil, email: nil) }
# WHERE ((`login` IS NULL) AND (`email` IS NULL))
DB[:users].exclude { Sequel.&(login: nil, email: nil) }
# WHERE NOT ((`login` IS NULL) AND (`email` IS NULL))
DB[:users].exclude { Sequel.&(Sequel.~(login: nil, email: nil)) }
# WHERE NOT ((`login` IS NOT NULL) OR (`email` IS NOT NULL))
DB[:users].where { Sequel.&(Sequel.~(login: nil), Sequel.~(email: nil)) }
# WHERE ((`login` IS NOT NULL) AND (`email` IS NOT NULL))
</pre>
<p>
<br />
</p>
<p>
Name select
</p>
<pre class="ruby">
DB[:zipcodes]
.join(:zones, id: :zone_id)
.join(:countries, id: Sequel[:zipcodes][:country_id])
.where(:zones__name => /namur/)
.select(:zipcodes__name___zipcode_name,
:zones__name___zone_name,
:countries__name___country_name)
# SELECT "zipcodes"."name" AS "zipcode_name",
# "zones"."name" AS "zone_name",
# "countries"."name" AS "country_name"
# FROM "zipcodes"
# INNER JOIN "zones"
# ON ( "zones"."id" = "zipcodes"."zone_id" )
# INNER JOIN "countries"
# ON ( "countries"."id" = "zipcodes"."country_id" )
# WHERE ( "zones"."name" ~ 'namur' )
</pre>
<p>
<br />
</p>
<pre class="ruby">
# REGEX
DB[:users].where(login: /Admin/i)
# WHERE (`login` REGEXP 'Admin')
</pre>
<p>
<br />
</p>
<div id="Sequel-Postgres"><h3 id="Postgres">Postgres</h3></div>
<p>
<a href="https://github.com/jeremyevans/sequel/blob/master/spec/adapters/postgres_spec.rb">Postgres' specs</a> (search "@db.create_table!(:items)")
</p>
<p>
<a href="http://sequel.jeremyevans.net/rdoc-plugins/files/lib/sequel/extensions/pg_json_ops_rb.html">pg_json_ops</a>
</p>
<pre class="ruby">
DB.extension :pg_array, :pg_json, :pg_json_ops
DB.create_table :movies do
column :genres, 'text[]' # Create an Array column
column :actors, 'jsonb' # jsonb column
end
DB[:movies].insert(genres: Sequel.pg_array(["Comedy", "Documentary"], :text))
DB[:movies].insert(actors: Sequel.pg_jsonb({"leading" => "Chuck Norris"}))
</pre>
<pre class="ruby">
# Store files in a PG database
DB.alter_table :paintings do
add_column :painting, File
end
painting_image = File.open("guernica.png").read
DB[:paintings].insert(painting: Sequel.blob(painting_image))
</pre>
<div id="Sequel-Tools"><h3 id="Tools">Tools</h3></div>
<p>
Copy databases
</p>
<pre>
sequel -C postgres://my_username@localhost/my_pg_db sqlite://my_sqlite_database.sqlite3
</pre>
</div>
</div>
</div>
</body>
</html>