我有一个User模型，has_one需要Company。使用FactoryBot，我想创建几个共享同一公司的用户。我看到一些advice，我解释为建议我在我的FactoryBot.define do块中创建Company对象，我可以将其用作我的用户的属性：
# In spec/factories/companies.rb
FactoryBot.define do
factory :company do
name { 'MyCompany' }
end
end
# In spec/factories/users.rb
FactoryBot.define do
company1 = FactoryBot.create(:company) # this will be shared by several users
factory :user1 do
first_name { 'Joe' }
last_name { 'Smith' }
company_id { company1.id }
end
factory :user2 do
first_name { 'Sam' }
last_name { 'Smith' }
company_id { company1.id }
end
end
这似乎首先起作用，除非我需要在rake db:create的测试容器中从头开始重新创建数据库。当rake运行时，它似乎初始化我的工厂并且FactoryBot.create(:company)步骤尝试运行，并且没有适当的db模式，因此它失败：
$ RAILS_ENV=test bundle exec rake db:rebuild
rake aborted!
ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR: relation "companies" does not exist
LINE 8: WHERE a.attrelid = '"companies"'::regclass
^
: SELECT a.attname, format_type(a.atttypid, a.atttypmod),
pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod,
c.collname, col_description(a.attrelid, a.attnum) AS comment
FROM pg_attribute a
LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum
LEFT JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_collation c ON a.attcollation = c.oid AND a.attcollation <> t.typcollation
WHERE a.attrelid = '"companies"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
这让我觉得我试图在错误的地方创造这些。
为我的测试数据设置company1等共享关联的最佳位置在哪里，以便在我的应用程序正确初始化之后和执行测试套件之前发生？
FWIW，这是错误堆栈：
ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR: relation "companies" does not exist
LINE 8: WHERE a.attrelid = '"companies"'::regclass
^
: SELECT a.attname, format_type(a.atttypid, a.atttypmod),
pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod,
c.collname, col_description(a.attrelid, a.attnum) AS comment
FROM pg_attribute a
LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum
LEFT JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_collation c ON a.attcollation = c.oid AND a.attcollation <> t.typcollation
WHERE a.attrelid = '"companies"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
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以这种方式创建对象时 - 每次初始化工厂时都会创建它们，无论它们是否将在特定的测试运行中使用。
通常情况下，拥有独立工厂并在测试中明确声明您希望来自同一公司的两个用户更好：
let(:company){ create :company }
let(:user1){ create :user, company: company }
let(:user2){ create :user, company: company }
对于你不关心确切关系并且只想重用一些有效值并避免关系级联的情况 - 在create_default gem中有test-prof解决方法（参见更多here）