ruby-on-rails – 在特定的json密钥上使用Postgresql json列过滤ActiveAdmin

2019年8月6日 227次阅读

我有一个Deal模型,其中包含一个名为deal_info的json列.它实际上是一组
JSON.

我正在使用主动管理员.

例如 ：

deal1.deal_info = [ { "modal_id": "4", "text1":"lorem" }, 
          { "modal_id": "6", "video2":"yonak" },
          { "modal_id": "9", "video2":"boom" } ] 
deal2.deal_info = [ { "modal_id": "10", "text1":"lorem" }, 
          { "modal_id": "11", "video2":"yonak" },
          { "modal_id": "11", "image4":"boom" } ]

作为第一步,我想有一个过滤器,使我能够根据deal_info json列至少包含一次其包含的json中的modal_id这一事实来过滤交易.

它将使我能够在选择下拉列表中选择例如modal_id = 6并过滤交易列表以仅显示交易1(参见上面的示例).

另一个挑战是我需要能够删除选择下拉列表中的重复项,以便不会多次使用相同的id：这里例如我不能有select = [4,6,9,10,11 ,11] …每个modal_id只能出现一次.

我只发现了this,但它对我不起作用.

我当前的活动管理员代码

ActiveAdmin.register Deal do
  filter :modal_id,
  as: :select 
  collection: deal_info.all.to_a.map ???? 
end

在安德烈回答之后编辑,这有助于前进而不是(尚未)解决问题

我添加了这段代码：

车型/ deal.rb

class Deal < ActiveRecord::Base
  store_accessor :deal_info, :modal_id
end

# using https://stackoverflow.com/questions/14605710/filter-activeadmin-with-hstore?lq=1
ransacker :modal_id do |parent|
   Arel::Nodes::InfixOperation.new('->', parent.table[:deal_info], 'modal_id')
 end

内部活动管理员交易文件

ActiveAdmin.register Deal do
     filter :modal_id,
     label: 'modal id',
     as: :select,
     collection: -> { Deal.all.pluck(:deal_info).flatten.map {|el| el['modal_id'] }.uniq }

似乎PARTLY工作但不完全.事实上它确实向我显示了正确的各种modal_id的下拉列表,并且它们很好地重复删除但是当我在下拉列表中选择其中一个时,然后单击右侧的过滤器(过滤器侧边栏所在的位置),它会加载整个页面再次没有应用过滤器.

例如,在我的modal_id下拉列表中,我可以选择ANY / 4/5/8.如果我选择modal_id 5并在包含所有交易的页面(应该在modal_id = 5上过滤)加载时单击FILTER按钮,在侧边栏modal_id选择下拉列表中,我没有看到5,因为我选择了但是任何. 5的值不是“KEPT”/“REMEMBERED”,它返回到ANY值.
我不明白为什么.

编辑2

我在AA上将过滤器名称更改为’eq’

ActiveAdmin.register Deal do
         filter :modal_id_eq,
         label: 'modal id',
         as: :select,
         collection: -> { Deal.all.pluck(:deal_info).flatten.map {|el| el['modal_id'] }.uniq }

但问题仍然存在.所以我检查发现我的ransack脚本已经过时,并且使用Rails 4.2我必须添加build_quoted如此处显示https://github.com/activerecord-hackery/ransack/wiki/Using-Ransackers#3-search-for-a-key-in-an-hstore-column-in-this-example-searching-an-hstore-column-called-properties-for-records-containing-a-key-called-link_type

所以现在我的代码是

车型/ deal.rb

class Deal < ActiveRecord::Base
  store_accessor :deal_info, :modal_id
end

# using https://stackoverflow.com/questions/14605710/filter-activeadmin-with-hstore?lq=1
ransacker :modal_id do |parent|
   Arel::Nodes::InfixOperation.new('->', parent.table[:deal_info], Arel::Nodes.build_quoted('modal_id') )
end

但现在我收到以下错误.我不知道这是由于Ransack,活动管理员还是这个Ransack脚本适用于hstore但不适用于我的json列类型或者可能是由于其他原因.

ActiveRecord::StatementInvalid at /admin/deals

PG::UndefinedFunction: ERROR:  operator does not exist: json = unknown
LINE 1: ...OM "deals" WHERE "deals"."deal_info" -> 'modal_id' = '4'

HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.
: SELECT COUNT(*) FROM "deals" WHERE "deals"."deal_info" -> 'modal_id' = '4':
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract_adapter.rb:455:in `translate_exception_class'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract_adapter.rb:468:in `rescue in log'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract_adapter.rb:466:in `log'
  activerecord (4.2.0) lib/active_record/connection_adapters/postgresql_adapter.rb:592:in `exec_no_cache'
  activerecord (4.2.0) lib/active_record/connection_adapters/postgresql_adapter.rb:584:in `execute_and_clear'
  activerecord (4.2.0) lib/active_record/connection_adapters/postgresql/database_statements.rb:160:in `exec_query'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract/database_statements.rb:336:in `select'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract/database_statements.rb:32:in `select_all'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract/query_cache.rb:68:in `block in select_all'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract/query_cache.rb:83:in `cache_sql'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract/query_cache.rb:68:in `select_all'
  activerecord (4.2.0) lib/active_record/relation/calculations.rb:264:in `execute_simple_calculation'
  activerecord (4.2.0) lib/active_record/relation/calculations.rb:221:in `perform_calculation'
  activerecord (4.2.0) lib/active_record/relation/calculations.rb:127:in `calculate'
  activerecord (4.2.0) lib/active_record/relation/calculations.rb:42:in `count'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/helpers/collection.rb:9:in `collection_size'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/views/components/scopes.rb:62:in `get_scope_count'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/views/components/scopes.rb:40:in `block (3 levels) in build_scope'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
  arbre (1.0.2) lib/arbre/context.rb:92:in `with_current_arbre_element'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:26:in `build_tag'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:14:in `span'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/views/components/scopes.rb:39:in `block (2 levels) in build_scope'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
  arbre (1.0.2) lib/arbre/context.rb:92:in `with_current_arbre_element'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:26:in `build_tag'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:14:in `a'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/views/components/scopes.rb:37:in `block in build_scope'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:31:in `block in build_tag'
  arbre (1.0.2) lib/arbre/context.rb:92:in `with_current_arbre_element'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:49:in `with_current_arbre_element'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:26:in `build_tag'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:39:in `insert_tag'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:14:in `li'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/views/components/scopes.rb:33:in `build_scope'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/views/components/scopes.rb:26:in `block in build'
   () home/mathieup/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/bundler/gems/activeadmin-7aef260921d4/lib/active_admin/views/components/scopes.rb:25:in `build'
  arbre (1.0.2) lib/arbre/element/builder_methods.rb:30:in `block in build_tag'
  arbre (1.0.2) lib/arbre/context.rb:92:in `with_current_arbre_element'

最佳答案 检查以下内容：

filter :modal_id_eq, # note _eq here
  label: 'modal id',
  as: :select,
  collection: -> { Deal.all.pluck(:deal_info).flatten.map {|el| el['modal_id'] }.uniq }
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