在特定的json鍵上過濾ActiveAdmin和Postgresql json列

Question

我有一個交易模型，它具有名爲deal_info的json列。它實際上是一個JSON數組。

我正在使用活動管理員。

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" } ] 

由於現在第一步我想有一個過濾器，這將使我基於這樣的事實，deal_info JSON列包括至少一個時間modal_id在過濾交易其包含的json之一。

它會使我在選擇下拉列表中選擇例如modal_id = 6，並將交易列表過濾爲僅顯示交易1（參見上面的示例）。

進一步的挑戰之一是我需要能夠刪除選擇下拉列表中的重複項，以便不會有多次相同的ID：這裏例如我不能有選擇= [4,6,9 ，10,11,11] ...每個modal_id只能出現一次。

我只找到this但它不適合我。安德烈的回答後

我現在的活動聯繫代號

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

編輯幫助推動，但（還）沒有解決問題

我加入這個代碼：

型號/ 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 

主動管理交易文件中

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 } 

它似乎部分工作，但不完全。確實，它確實在下拉列表中顯示了正確的各種modal_id，並且它們很好地被重複刪除，但是當我在下拉列表中選擇其中一個時，並單擊右側的過濾器（過濾器邊欄）時，它會加載整個頁面再次沒有應用過濾器。

例如，在我的modal_id下拉列表中，我有ANY/4/5/8之間的選擇。如果我選擇modal_id 5，並在加載了所有交易（應該在modal_id = 5上進行過濾）的頁面時單擊FILTER按鈕，在側欄modal_id選擇下拉列表中，我看不到5，因爲我選擇了但是ANY。 5的值不是「KEPT」/「REMEMBERED」，它回到ANY值。 我不明白爲什麼。

EDIT 2

我對AA過濾器名稱變更爲 '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 } 

但問題仍然是相同的。所以我查了一下，發現我的ransack腳本已經過時，並且使用Rails 4。2我有那麼現在我的代碼是

型號/ 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 

但現在我發現了以下錯誤來加build_quoted因爲在這裏展示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

。我不知道這是由於Ransack，主動管理員或事實這個Ransack腳本爲hstore工作，但不是我的類型的json列或可能由於其他原因。

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

檢查的東西沿着這些路線：

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 } 

Answer 2

我用Rails 4.2和activeadmin（最新版本爲2015年9月11日），這工作得十分完美。

型號：

ransacker :card_code do |parent| 
    Arel::Nodes::InfixOperation.new(
     '->>', parent.table[:data], Arel::Nodes.build_quoted('card_code')) 
    end 

主動管理文件

filter :card_code_eq, label: 'Card code' 

請注意，我用' - >>' 的代替' - >'自後者返回一個需要被施放的JSON對象（我相信這是你遇到的問題）。請參閱PostgreSQL functions and operators獲取解釋。

希望自6月份以來，您解決了您的問題，但我認爲該解決方案可能對未來的其他人有用。