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我正在使用actastaggableon gem。出于某种原因，系统将标签“Python”保存为“python（小写）”。由于我正在验证用户只能输入某些标签，因此将标签保存为“python”的系统会导致一些问题。以下是我的服务器日志。第一行是所有验证运行（通过）后 tag_list 的 puts 语句。然后，服务器正在做一些奇怪的事情并将“Python”变成“python”。这可能与缓存有关，因为我曾经有一个名为“python”的标签，但我不再这样做了。如何在不严重更改缓存设置的情况下解决此问题？ 

    ["IOS | IPhone | IPad", "App and Web development", "PHP", "Rails", "Python"]
      ActsAsTaggableOn::Tag Load (0.8ms)  SELECT "tags".* FROM "tags" WHERE (lower(name) = 'ios | iphone | ipad' OR lower(name) = 'app and web development' OR lower(name) = 'php' OR lower(name) = 'rails' OR lower(name) = 'python')
      ActsAsTaggableOn::Tag Load (0.8ms)  SELECT "tags".* FROM "tags" WHERE (lower(name) = 'ios | iphone | ipad' OR lower(name) = 'app and web development' OR lower(name) = 'php' OR lower(name) = 'rails' OR lower(name) = 'python')
      CACHE (0.0ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2 AND (taggings.context = 'tags' AND taggings.tagger_id IS NULL)  [["taggable_id", 16], ["taggable_type", "Profile"]]
      CACHE (0.0ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2 AND (taggings.context = 'tags' AND taggings.tagger_id IS NULL)  [["taggable_id", 16], ["taggable_type", "Profile"]]
      ActsAsTaggableOn::Tagging Exists (0.6ms)  SELECT 1 AS one FROM "taggings" WHERE ("taggings"."tag_id" = 1 AND "taggings"."taggable_type" = 'Profile' AND "taggings"."taggable_id" = 16 AND "taggings"."context" = 'tags' AND "taggings"."tagger_id" IS NULL AND "taggings"."tagger_type" IS NULL) LIMIT 1
      ActsAsTaggableOn::Tagging Exists (0.6ms)  SELECT 1 AS one FROM "taggings" WHERE ("taggings"."tag_id" = 1 AND "taggings"."taggable_type" = 'Profile' AND "taggings"."taggable_id" = 16 AND "taggings"."context" = 'tags' AND "taggings"."tagger_id" IS NULL AND "taggings"."tagger_type" IS NULL) LIMIT 1
      SQL (3.8ms)  INSERT INTO "taggings" ("context", "created_at", "tag_id", "taggable_id", "taggable_type") VALUES ($1, $2, $3, $4, $5) RETURNING "id"  [["context", "tags"], ["created_at", Tue, 25 Mar 2014 16:05:41 EDT -04:00], ["tag_id", 1], ["taggable_id", 16], ["taggable_type", "Profile"]]
      SQL (3.8ms)  INSERT INTO "taggings" ("context", "created_at", "tag_id", "taggable_id", "taggable_type") VALUES ($1, $2, $3, $4, $5) RETURNING "id"  [["context", "tags"], ["created_at", Tue, 25 Mar 2014 16:05:41 EDT -04:00], ["tag_id", 1], ["taggable_id", 16], ["taggable_type", "Profile"]]
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1 回答 1

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你有没有把它设置在某个地方：

ActsAsTaggableOn.force_lowercase = true

如果是这样，那就是强制小写

如果您没有该设置，则另一个可能的问题是，如果您使用 mysql for db，可以在此处找到： https ://github.com/mbleigh/acts-as-taggable-on/issues/259

class EditTagTableToBeCaseSensitive < ActiveRecord::Migration
  def up
    @sql = "ALTER TABLE `tags` CHANGE `name` `name` VARCHAR(255) BINARY DEFAULT NULL;"
    execute @sql
  end

  def down
    @sql = "ALTER TABLE `tags` CHANGE `name` `name` VARCHAR(255) DEFAULT NULL;"
    execute @sql
  end
end
于 2014-03-25T20:24:33.840 回答