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User Exists? (1.3ms) SELECT 1 AS one FROM "users" WHERE "users"."username" = $1 LIMIT $2 [["username", "michael"], ["LIMIT", 1]] | |
User Create (0.5ms) INSERT INTO "users" ("username", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id" [["username", "michael"], ["created_at", "2022-12-29 14:51:02.384023"], ["updated_at", "2022-12-29 14:51:02.384023"]] | |
User Exists? (0.4ms) SELECT 1 AS one FROM "users" WHERE "users"."username" = $1 LIMIT $2 [["username", "lebron"], ["LIMIT", 1]] | |
User Create (0.2ms) INSERT INTO "users" ("username", "created_at", "updated_at") VALUES ($1, $2, $3) RETURNING "id" [["username", "lebron"], ["created_at", "2022-12-29 14:51:02.386506"], ["updated_at", "2022-12-29 14:51:02.386506"]] | |
User Exists? (0.3ms) SELECT 1 AS one FROM "users" WHERE "users"."username" = $1 LIMIT $2 [["username", "michael"], ["LIMIT", 1]] | |
TRANSACTION (0.3ms) ROLLBACK |
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class User < ApplicationRecord | |
validates_uniqueness_of :username | |
end |
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require "test_helper" | |
class UserTest < ActiveSupport::TestCase | |
test "inserting users in a transaction" do | |
assert_difference ->{ User.count }, 0 do | |
begin | |
ActiveRecord::Base.transaction do | |
User.create!(username: "michael") # short-cut for `new(...).save!` | |
User.create!(username: "lebron") | |
User.create!(username: "michael") # not unique error | |
end | |
rescue ActiveRecord::RecordInvalid | |
nil | |
end | |
end | |
end | |
end |
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