ditkrg/validates_timeliness
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fixed error on database write with saving cached values for time attributes which have been converted

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This commit is contained in:
Adam Meehan 2008-06-30 16:30:13 +10:00
parent ed23c4a9a4
commit 39e16d2fde
2 changed files with 11 additions and 21 deletions
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24
lib/validates_timeliness/attribute_methods.rb
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@ -10,10 +10,6 @@ module ValidatesTimeliness
# be converted to local timezone and then stored and cached to avoid the need
# for any subsequent differentiation.
#
# One last check is made before values are persisted to the database so that
# the original raw user entered value is not improperly type cast by the default
# Rails time type casting.
#
# A wholesale replacement of the Rails time type casting is not done to preserve
# the quick conversion for timestamp columns and also any value which is never
# touched during the life of the record object.
@ -36,21 +32,14 @@ module ValidatesTimeliness
time.respond_to?(:in_time_zone) ? time.in_time_zone : time rescue time
end
# checks if an attribute value has been cached as nil but has a nono-nil
# stored value which indicates the time value failed the type casting.
def failed_strict_time_type_cast?(attr_name)
attr_name = attr_name.to_s
@attributes_cache.has_key?(attr_name) && @attributes_cache[attr_name].nil? && !@attributes[attr_name].nil?
end
def read_attribute(attr_name)
attr_name = attr_name.to_s
if !(value = @attributes[attr_name]).nil?
if column = column_for_attribute(attr_name)
if unserializable_attribute?(attr_name, column)
unserialize_attribute(attr_name)
elsif column.klass == Time && failed_strict_time_type_cast?(attr_name)
nil
elsif column.klass == Time && @attributes_cache.has_key?(attr_name)
@attributes_cache[attr_name]
else
column.type_cast(value)
end
@ -70,9 +59,11 @@ module ValidatesTimeliness
method_body = <<-EOV
def #{attr_name}=(time)
@attributes['#{attr_name}'] = time
time = strict_time_type_cast(time)
@attributes_cache['#{attr_name}'] = time.respond_to?(:in_time_zone) ? time.in_time_zone : time
unless time.acts_like?(:time)
time = strict_time_type_cast(time)
end
time = time.respond_to?(:in_time_zone) ? time.in_time_zone : time
@attributes_cache['#{attr_name}'] = time
end
EOV
evaluate_attribute_method attr_name, method_body, "#{attr_name}="
@ -114,7 +105,6 @@ module ValidatesTimeliness
define_read_method_for_serialized_attribute(name)
elsif column.klass == Time
define_read_method_for_time_zone_conversion(name.to_sym)
define_write_method_for_time_zone_conversion(name.to_sym)
else
define_read_method(name.to_sym, name, column)
end

6
spec/attribute_methods_spec.rb
View File

@ -69,8 +69,7 @@ describe ValidatesTimeliness::AttributeMethods do
Time.zone = 'Melbourne'
time_string = "2000-06-01 01:02:03"
@person.birth_date_and_time = time_string
@person.birth_date_and_time.utc_offset.should == 10.hours
@person.birth_date_and_time.strftime('%Y-%m-%d %H:%M:%S').should == time_string
@person.birth_date_and_time.strftime('%Y-%m-%d %H:%M:%S %Z %z').should == time_string + ' EST +1000'
end
it "should return time object from database in correct timezone" do
@ -80,8 +79,9 @@ describe ValidatesTimeliness::AttributeMethods do
@person.birth_date_and_time = time_string
@person.save
@person.reload
@person.birth_date_and_time.to_s(:db).should == time_string
@person.birth_date_and_time.strftime('%Y-%m-%d %H:%M:%S %Z %z').should == time_string + ' EST +1000'
end
end
it "should return same time object on repeat reads" do