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Add an explicit test for hot compatibility
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require 'cases/helper' | ||
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class HotCompatibilityTest < ActiveRecord::TestCase | ||
self.use_transactional_fixtures = false | ||
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setup do | ||
@klass = Class.new(ActiveRecord::Base) do | ||
connection.create_table :hot_compatibilities do |t| | ||
t.string :foo | ||
t.string :bar | ||
end | ||
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def self.name; 'HotCompatibility'; end | ||
end | ||
end | ||
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teardown do | ||
@klass.connection.drop_table :hot_compatibilities | ||
end | ||
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test "insert after remove_column" do | ||
# warm cache | ||
@klass.create! | ||
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# we have 3 columns | ||
assert_equal 3, @klass.columns.length | ||
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# remove one of them | ||
@klass.connection.remove_column :hot_compatibilities, :bar | ||
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# we still have 3 columns in the cache | ||
assert_equal 3, @klass.columns.length | ||
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# but we can successfully create a record so long as we don't | ||
# reference the removed column | ||
record = @klass.create! foo: 'foo' | ||
record.reload | ||
assert_equal 'foo', record.foo | ||
end | ||
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test "update after remove_column" do | ||
record = @klass.create! foo: 'foo' | ||
assert_equal 3, @klass.columns.length | ||
@klass.connection.remove_column :hot_compatibilities, :bar | ||
assert_equal 3, @klass.columns.length | ||
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record.reload | ||
assert_equal 'foo', record.foo | ||
record.foo = 'bar' | ||
record.save! | ||
record.reload | ||
assert_equal 'bar', record.foo | ||
end | ||
end |