ARel and Rails 2
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ARel and Rails 2 Building fast queries Friday, 4 June 2010
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ARel and Rails 2Building fast queries
Friday, 4 June 2010
Friday, 4 June 2010
Rails 3
Friday, 4 June 2010
Rails 3Coming Soon (tm)
Friday, 4 June 2010
Rails 3Coming Soon (tm)
Maybe RailsConf?
Friday, 4 June 2010
Rails 3.1
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Friday, 4 June 2010
Ruby on Rails
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Rails Conf
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?Friday, 4 June 2010
Rails Conf
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Friday, 4 June 2010
Friday, 4 June 2010
ARel and Rails 2
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User.find_by_sql(“<insanely complex SQL goes here>”)
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ARel
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Arel::Table.engine = Arel::Sql::Engine.new(ActiveRecord::Base)
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Table(:users)
Rails 2
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User
Rails 3
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where
join
project
order
take
skip
to_sql
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where
join
project
order
take
skip
to_sql
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eq
not_eqlt
lteqgt
gteq
in
not_matches
where
not_in
matches
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*_any *_all
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users = Table(:users)
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users.where(users[:first_name].eq_any(“Ryan”, “Bob”, “Alice”, “Etc.”))
any
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eq
users.where(users[:first_name].eq(“Ryan”))
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User.find_all_by_first_name(“Ryan”)
old skool
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ryans = users.where(users[:first_name].eq(“Ryan”))ryans.where(users[:programmer].eq(true))
chainable
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in
users.where(emails[:sent_at].in((2.weeks.ago)..(1.week.ago))
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where
join
project
order
take
skip
to_sql
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users.join(emails).on(emails[:user_id].eq(users[:id]).where(emails[:sent_at].lteq(2.weeks.ago))
joinlteq
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users.join(donations).on(donations[:user_id].eq(users[:id])). join(invites).on(invites[:id].eq(donations[:invite_id])). join(pushes).on(pushes[:id].eq(invites[:push_id])). join(campaigns).on(campaigns[:id].eq(pushes[:campaign_id])). where(campaigns[:id].eq(parameters[:campaign_id]))
super join
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users.join(donations).on(donations[:user_id].eq(users[:id])). join(invites).on(invites[:id].eq(donations[:invite_id])). join(pushes).on(pushes[:id].eq(invites[:push_id])). where(campaigns[:id].eq(parameters[:campaign_id])). join(campaigns).on(campaigns[:id].eq(pushes[:campaign_id]))
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where
join
project
order
take
skip
to_sql
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SELECT “users”.”id”, “users”.”username”, “users”.”email”, “users”.”first_name”, “users”.”last_name”, “users”.”title”, “users”.”company”, “users”.”alt_email”, “users”.”phone”, “users”.”mobile”, “users”.”aim”, “users”.”yahoo”, “users”.”google”, “users”.”skype”, “users”.”password_hash”, “users”.”password_salt”, “users”.”persistence_token”, “users”.”perishable_token”, “users”.”last_request_at”, “users”.”last_login_at”, “users”.”current_login_at”, “users”.”last_login_ip”, “users”.”current_login_ip”, “users”.”login_count”, “users”.”deleted_at”, “users”.”created_at”, “users”.”updated_at”, “users”.”admin”, “users”.”suspended_at”, “users”.”failed_login_count”, “users”.”facebook_email”, “users”.”facebook_uid”, “users”.”facebook_session_key”, “users”.”oauth_token”, “users”.”oauth_secret”, “users”.”twitter_uid”, “users”.”twitter_login”, “users”.”twitter_name”, “users”.”avatar_url”, “users”.”address”, “users”.”suburb”, “users”.”country”, “users”.”facebook_enabled_at”, “users”.”twitter_enabled_at”, “users”.”email_confirmed_at”, “users”.”postcode_id”, “users”.”state”, “users”.”gender”, “users”.”born_on”, “users”.”marital_status”, “users”.”industry_id”, “users”.”ethnicity_id”, “users”.”has_children”, “users”.”has_grandchildren”, “users”.”has_nesb”, “donations”.”id”, “donations”.”user_id”, “donations”.”amount_in_cents”, “donations”.”frequency”, “donations”.”payment_method”, “donations”.”cc_expiry_month”, “donations”.”cc_expiry_year”, “donations”.”created_at”, “donations”.”updated_at”, “donations”.”active”, “donations”.”last_donated_at”, “donations”.”cc_last_four_digits”, “donations”.”cc_name_on_card”, “donations”.”client_id”, “donations”.”invite_id”, “invites”.”id”, “invites”.”push_id”, “invites”.”name”, “invites”.”description”, “invites”.”launch_date”, “invites”.”status”, “invites”.”medium”, “invites”.”ask”, “invites”.”page_series”, “invites”.”pause_at_number”, “invites”.”number_sent”, “invites”.”opens”, “invites”.”clicks”, “invites”.”actions_taken”, “invites”.”revenue”, “invites”.”deleted_at”, “invites”.”created_at”, “invites”.”updated_at”, “invites”.”generation_id”, “invites”.”spam_reports”, “invites”.”bounces”, “invites”.”requests”, “invites”.”list_id”, “pushes”.”id”, “pushes”.”name”, “pushes”.”status”, “pushes”.”start_date”, “pushes”.”end_date”, “pushes”.”objective”, “pushes”.”target”, “pushes”.”budget”, “pushes”.”donations_target”, “pushes”.”members_target”, “pushes”.”opens_target”, “pushes”.”clicks_target”, “pushes”.”actions_target”, “pushes”.”created_at”, “pushes”.”updated_at”, “pushes”.”campaign_id”, “pushes”.”deleted_at”, “campaigns”.”id”, “campaigns”.”user_id”, “campaigns”.”assigned_to”, “campaigns”.”name”, “campaigns”.”access”, “campaigns”.”status”, “campaigns”.”budget”, “campaigns”.”revenue”, “campaigns”.”start_date”, “campaigns”.”end_date”, “campaigns”.”objective”, “campaigns”.”deleted_at”, “campaigns”.”created_at”, “campaigns”.”updated_at”, “campaigns”.”outcome”, “campaigns”.”target” FROM “users” INNER JOIN “donations” ON “donations”.”user_id” = “users”.”id” INNER JOIN “invites” ON “invites”.”id” = “donations”.”invite_id” INNER JOIN “pushes” ON “pushes”.”id” = “invites”.”push_id” INNER JOIN “campaigns” ON “campaigns”.”id” = “pushes”.”campaign_id” WHERE “campaigns”.”id” IS NULL
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SELECT users.* FROM “users” INNER JOIN “donations” ON “donations”.”user_id” = “users”.”id” INNER JOIN “invites” ON “invites”.”id” = “donations”.”invite_id” INNER JOIN “pushes” ON “pushes”.”id” = “invites”.”push_id” INNER JOIN “campaigns” ON “campaigns”.”id” = “pushes”.”campaign_id” WHERE “campaigns”.”id” IS NULL
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.project(“users.*”)
project
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where
join
project
order
take
skip
to_sql
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users.order(users[:first_name])
order
users.order(users[:first_name].desc)
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where
join
project
order
take
skip
to_sql
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users.take(5)
take
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where
join
project
order
take
skip
to_sql
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users.skip(10).take(5)
skip
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where
join
project
order
take
skip
to_sql
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users.take(5).project(“*”).to_sql
"SELECT * FROM \"users\" LIMIT 5"
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User.find_by_sql(users.to_sql)
Finding?
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temporary_users = connection.select_values(sql)
temporary_users.uniq.flatten.map! do |user_ids| [self.id, user_ids].join(",")end.join("\n") query = "COPY lists_users(list_id, user_id) FROM STDIN WITH CSV"raw_connection.exec(query)raw_connection.put_copy_data(temporary_users)raw_connection.put_copy_end
Real world usage
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Custom SQL
users.order(“RANDOM()”)
users.where(“foo = bar”)
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Done.
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