查询 Ahoy Gem 事件
Querying Ahoy Gem Events
我在 Rails 4.2 应用程序中使用 Ahoy gem。 Ahoy Events 存储具有多个文本属性和包含我要查询的数据的 properties 属性的事件。例如，这是我通过 rails 控制台 return 的最后一个事件
>> Ahoy::Event.last
Ahoy::Event Load (3.8ms) SELECT "ahoy_events".* FROM "ahoy_events" ORDER BY "ahoy_events"."id" DESC LIMIT 1
=> #<Ahoy::Event id: "fffff17f-44e6-41d7-9c32-fa895338f54e", visit_id: "6b05b1ca-3863-46da-9c48-a3ab5fa4a9ee", user_id: 1, name: "$click", properties: {"tag"=>"a", "page"=>"/conversations/2", "text"=>"View", "href"=>"/conversations/2"}, time: "2015-08-23 13:25:51">
我将如何检索属性 ['text'] = 'View'
的所有事件
我试过了Ahoy::Event.where(:properties['text'] => 'View').count
其中 return：
```
Ahoy::Event.where(:properties['text'] => 'View').count
NoMethodError: undefined method to_sym' for nil:NilClass
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:59:inblock in expand_hash_conditions_for_aggregates'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:58:in each'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:58:inexpand_hash_conditions_for_aggregates'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:957:in build_where'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:584:inwhere!'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:574:in where'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/querying.rb:10:inwhere'
from (irb):13
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:110:in start'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:9:instart'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:68:in console'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:inrun_command!'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in <top (required)>'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in block in require'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:inload_dependency'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in require'
from /Users/dariusgoore/development/blackops/bin/rails:8:in'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in load'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:inblock in load'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in load_dependency'
from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:inload'
from /Users/dariusgoore/.rubies/ruby-2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in require'
from /Users/dariusgoore/.rubies/ruby-2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:inrequire'
```
我在网上查找了查询哈希属性的方法，但没有成功。非常感谢任何指导。
Ahoy::Event 实际上 return 没有任何用处。要获取数组 return 对象中的所有记录，您需要使用 Ahoy::Event.all.
所以你真正需要做的是类似这样的事情：
Ahoy::Event.all.select { |event| event.properties['text'] == "View" }.size
运行 时间不会那么美好，但我认为这就是您所需要的。
使用 Ahoy::Event.where("properties ->> 'text' = 'View'") 方式更快地使用有效的 JSONB 查询语法。
我在 Rails 4.2 应用程序中使用 Ahoy gem。 Ahoy Events 存储具有多个文本属性和包含我要查询的数据的 properties 属性的事件。例如，这是我通过 rails 控制台 return 的最后一个事件
>> Ahoy::Event.last
Ahoy::Event Load (3.8ms) SELECT "ahoy_events".* FROM "ahoy_events" ORDER BY "ahoy_events"."id" DESC LIMIT 1
=> #<Ahoy::Event id: "fffff17f-44e6-41d7-9c32-fa895338f54e", visit_id: "6b05b1ca-3863-46da-9c48-a3ab5fa4a9ee", user_id: 1, name: "$click", properties: {"tag"=>"a", "page"=>"/conversations/2", "text"=>"View", "href"=>"/conversations/2"}, time: "2015-08-23 13:25:51">
我将如何检索属性 ['text'] = 'View'
的所有事件我试过了Ahoy::Event.where(:properties['text'] => 'View').count
其中 return： ```
Ahoy::Event.where(:properties['text'] => 'View').count NoMethodError: undefined method
to_sym' for nil:NilClass from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:59:inblock in expand_hash_conditions_for_aggregates' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:58:ineach' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:58:inexpand_hash_conditions_for_aggregates' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:957:inbuild_where' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:584:inwhere!' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:574:inwhere' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/querying.rb:10:inwhere' from (irb):13 from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:110:instart' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:9:instart' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:68:inconsole' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:inrun_command!' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in<top (required)>' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inblock in require' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:inload_dependency' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire' from /Users/dariusgoore/development/blackops/bin/rails:8:in' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:inload' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:inblock in load' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:inload_dependency' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:inload' from /Users/dariusgoore/.rubies/ruby-2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:inrequire' from /Users/dariusgoore/.rubies/ruby-2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:inrequire' ```
我在网上查找了查询哈希属性的方法，但没有成功。非常感谢任何指导。
Ahoy::Event 实际上 return 没有任何用处。要获取数组 return 对象中的所有记录，您需要使用 Ahoy::Event.all.
所以你真正需要做的是类似这样的事情：
Ahoy::Event.all.select { |event| event.properties['text'] == "View" }.size
运行 时间不会那么美好，但我认为这就是您所需要的。
使用 Ahoy::Event.where("properties ->> 'text' = 'View'") 方式更快地使用有效的 JSONB 查询语法。