ruby-on-rails - 使用特定 json 键上的 Postgresql json 列过滤 ActiveAdmin

Question

我有一个交易模型，其中包含一个名为 deal_info 的 json 列。它实际上是一个 JSON 数组。

我正在使用活跃的管理员。

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" } ]

作为现在的第一步，我想要一个过滤器，使我能够根据以下事实过滤交易:deal_info json 列在其包含的 json 中至少包含一次 modal_id。

这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)。

进一步的挑战之一是我需要能够删除选择下拉列表中的重复项，以免多次出现相同的 ID:例如，这里我不能有 select = [4,6,9, 10,11,11]...每个modal_id只能出现一次。

我只找到了this但它对我不起作用。

我当前的有效管理员代码

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

在 Andrei 回答后进行编辑，这有助于向前推进但(尚未)解决问题

我添加了这段代码:

models/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

在活跃的管理员交易文件中

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 }

它似乎部分起作用但不完全。事实上，它确实在下拉菜单中向我显示了各种 modal_id，并且它们被很好地删除了，但是当我在下拉菜单中选择其中一个，并单击右侧的 FILTER(过滤器侧边栏所在的位置)时，它会加载整个页面再次不应用过滤器。

例如，在我的 modal_id 下拉列表中，我可以在 ANY/4/5/8 之间进行选择。如果我选择 modal_id 5 并在包含所有交易(应该在 modal_id = 5 上过滤)的页面加载时单击 FILTER 按钮，在侧边栏 modal_id 选择下拉列表中，我看不到我选择的 5，但是任何。 5 的值不是“KEPT”/“REMEMBERED”，它又回到了值 ANY。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 }

但是问题还是一样。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 如下所示 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

models/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、活跃的管理员还是因为这个 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'

Answer 1

检查这些内容:

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 }