Question

我正在尝试创建一条记录，但我收到了这个错误。

[40] pry(main)> a = TopicPost.new(topic_id: "professional_safety", pub_date: "5a612420-21e2-11e6-bdf4-0800200c9a66")
=> #<TopicPost topic_id: "professional_safety", pub_date: 5a612420-21e2-11e6-bdf4-0800200c9a66, publisher: nil, author_id: nil, id: nil, message: nil, name: nil, link: nil, shared_count: nil, prospect_score: nil, indico_score: nil, keywords: #<Set: {}>, updated_at: nil, created_at: nil, profile_image: nil, bio: nil, account_link: nil, twitter_handle: nil, favorite_count: nil, followers_count: nil, klout_score: nil, has_engagements: nil, is_retweet: nil, engaged_influencer_ids: #<Set: {}>, urls: #<Set: {}>, images: #<Set: {}>, feed_name: nil, feed_url: nil, description: nil, title: nil, batch_id: nil, score: nil, fcm: nil, scorelog: {}>
[41] pry(main)> a.save
Cql::QueryError: Missing mandatory PRIMARY KEY part id
from /home/blau08/.rvm/gems/ruby-2.1.2/gems/cql-rb-2.0.4/lib/cql/client/client.rb:545:in `execute'
[42] pry(main)>

Answer 1

你的桌面结构是什么样的？

我猜你有一个复合PRIMARY KEY，而id列是它的一部分。 Cassandra PRIMARY KEYs是唯一的，因此您必须提供完整的插入键。

在查看代码时，特别是注释掉的部分，我确实看到了一个线索：

[40] pry(main)> a = TopicPost.new(topic_id: "professional_safety", pub_date: "5a612420-21e2-11e6-bdf4-0800200c9a66")
=> #<TopicPost topic_id: "professional_safety", pub_date: 5a612420-21e2-11e6-bdf4-0800200c9a66, publisher: nil, author_id: nil, id: nil, message: nil, name: nil, link: nil, shared_count: nil, prospect_score: nil, indico_score: nil, keywords: #<Set: {}>, updated_at: nil, created_at: nil, profile_image: nil, bio: nil, account_link: nil, twitter_handle: nil, favorite_count: nil, followers_count: nil, klout_score: nil, has_engagements: nil, is_retweet: nil, engaged_influencer_ids: #<Set: {}>, urls: #<Set: {}>, images: #<Set: {}>, feed_name: nil, feed_url: nil, description: nil, title: nil, batch_id: nil, score: nil, fcm: nil, scorelog: {}>

您似乎没有在id声明中为TopicPost.new提供值，但我确实在您的评论中看到了这一点：

author_id: nil, id: nil, message: nil

尝试为id提供值。当然，如果没有看到您的PRIMARY KEY定义，可能会有其他必需的列，您没有提供值，但从那里开始。

CQL Cassandra缺少必需的PRIMARY KEY部分ID

1 个答案: