小编Jan*_*dek的帖子

我有这样的模型:

class User < ActiveRecord::Base
  validates_length_of :name, :in => (2..5)
end

我想测试一下这个验证:

it "should not allow too short name" do
  u = User.new(:name => "a")
  u.valid?
  u.should have(1).error_on(:name)
end

但是它没有测试设置了哪种错误name.我想知道,如果是too_short,too_long,或者一些其它的验证失败.

我可以在errors数组中查找消息文本,如下所示:

u.errors[:name].should include(I18n.t("activerecord.errors.models.user.attributes.name.too_short"))

但是当我activerecord.errors.messages.too_short在locale文件中设置而不是特定于模型的消息时,这将失败.

那么,是否可以检查出现了哪种错误？

我使用wget如下:

wget --page-requisites --convert-links -e robots=off \
     --span-hosts --restrict-file-names=windows \
     --directory-prefix=$ASSETS_DIR --no-directories http://myhost/home

HTML页面引用样式表文件application.css,其中包括以下内容:

@import url(https://fonts.googleapis.com/css?family=Quicksand:700);

wget正确创建一个css@family=Quicksand%3A700包含以下内容的文件:

@font-face {
  font-family: 'Quicksand';
  font-style: normal;
  font-weight: 700;
  src: local('Quicksand Bold'), local('Quicksand-Bold'), url(https://themes.googleusercontent.com/static/fonts/quicksand/v3/32nyIRHyCu6iqEka_hbKsonF5uFdDttMLvmWuJdhhgs.ttf) format('truetype');
}

但是,wget不会下载此处引用的实际TTF文件.当我更改镜像页面上的CSS并@font-face直接粘贴规则时application.css,它会下载TTF文件.(但我不想那样做 - 我更喜欢继续使用@import谷歌字体).

有没有办法强制wget解析@imported样式表并下载其引用？

我有一个基于RestKit的应用程序与一个映射类.一切似乎都很好.但是,当我检索对象时,RestKit会发出警告:

W restkit.object_mapping:RKObjectMapper.m:90 Found a collection containing only NSNull values, considering the collection unmappable...

警告出现两次(可能是因为JSON响应中有两个对象).我该如何解决这个问题？

这是我的映射:

RKManagedObjectMapping* presentationMapping = [RKManagedObjectMapping mappingForClass:[Presentation class]];
presentationMapping.primaryKeyAttribute = @"presentationId";
[presentationMapping mapKeyPath:@"id" toAttribute:@"presentationId"];
[presentationMapping mapKeyPath:@"title" toAttribute:@"title"];
[presentationMapping mapKeyPath:@"description" toAttribute:@"descriptionText"];
[presentationMapping mapKeyPath:@"download_url" toAttribute:@"downloadUrlString"];
[presentationMapping mapKeyPath:@"download_file_size" toAttribute:@"downloadFileSize"];

[objectManager.mappingProvider setMapping:presentationMapping forKeyPath:@"presentation"];

这是我检索对象的方法:

[[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/presentations" delegate:self];

这是我的JSON结构(通过curl检索):

[
  {
    "presentation": {
      "created_at":"2011-08-13T17:09:40+02:00",
      "description":"Lorem ipsum",
      "id":1,
      "title":"Xxx",
      "updated_at":"2011-08-13T17:09:40+02:00",
      "download_url":"http://xxx.example.com/system/downloads/1/original/presentation1.zip?1313248180",
      "download_file_size":171703
    }
  },
  {
    "presentation": {
      "created_at":"2011-08-13T17:10:30+02:00",
      "description":"Dolor sit amet",
      "id":2,
      "title":"Zzz",
      "updated_at":"2011-08-15T00:22:10+02:00",
      "download_url":"http://xxx.example.com/system/downloads/2/original/zzz.zip?1313360530",
      "download_file_size":3182117
    }
  }
]

服务器是我控制的Rails 3.0应用程序,如果需要可以修改响应格式. …

是否可以在Doctrine_RawSql查询中使用聚合值？这是我正在尝试做的事情:

$q = new Doctrine_RawSql();
$q->select('{q.*}, AVG(a.value) AS avg');
$q->from('-- complex from clause');
$q->addComponent('q', 'Question');

但是,Doctrine创建的SQL仅保留表中的列question并省略聚合值avg.