colonne.id = { procedure_id:, column_id: }.to_json

because:
- id should be a string as other id
- id need procedure_id to allow ColumnType.deserialize(id) -> Column as the columns are built by a procedure

app/controllers/instructeurs/procedures_controller.rb

@@ -158,7 +158,7 @@ module Instructeurs
       @statut = statut
       @procedure = procedure
       @procedure_presentation = procedure_presentation
-      @column = procedure.find_column(id: params[:column])
+      @column = procedure.find_column(h_id: JSON.parse(params[:column], symbolize_names: true))
     end
 
     def remove_filter

app/models/column.rb

@@ -18,13 +18,9 @@ class Column
     @displayable = displayable
   end
 
-  def id
-    "#{table}/#{column}"
-  end
-
-  def ==(other)
-    other.to_json == to_json
-  end
+  def id = h_id.to_json
+  def h_id = { procedure_id: @procedure_id, column_id: "#{table}/#{column}" }
+  def ==(other) = h_id == other.h_id # using h_id instead of id to avoid inversion of keys
 
   def to_json
     {

app/models/concerns/columns_concern.rb

@@ -4,7 +4,10 @@ module ColumnsConcern
   extend ActiveSupport::Concern
 
   included do
-    def find_column(id:) = columns.find { |f| f.id == id }
+    def find_column(h_id: nil, label: nil)
+      return columns.find { _1.h_id == h_id } if h_id.present?
+      return columns.find { _1.label == label } if label.present?
+    end
 
     def columns
       columns = dossier_columns

app/models/procedure_presentation.rb

@@ -81,8 +81,10 @@ class ProcedurePresentation < ApplicationRecord
   end
 
   def add_filter(statut, column_id, value)
+    h_id = JSON.parse(column_id, symbolize_names: true)
+
     if value.present?
-      column = procedure.find_column(id: column_id)
+      column = procedure.find_column(h_id:)
 
       case column.table
       when TYPE_DE_CHAMP
@@ -103,7 +105,8 @@ class ProcedurePresentation < ApplicationRecord
   end
 
   def remove_filter(statut, column_id, value)
-    column = procedure.find_column(id: column_id)
+    h_id = JSON.parse(column_id, symbolize_names: true)
+    column = procedure.find_column(h_id:)
     updated_filters = filters.dup
 
     updated_filters[statut] = filters[statut].reject do |filter|
@@ -114,8 +117,8 @@ class ProcedurePresentation < ApplicationRecord
   end
 
   def update_displayed_fields(column_ids)
-    column_ids = Array.wrap(column_ids)
-    columns = column_ids.map { |id| procedure.find_column(id:) }
+    h_ids = Array.wrap(column_ids).map { |id| JSON.parse(id, symbolize_names: true) }
+    columns = h_ids.map { |h_id| procedure.find_column(h_id:) }
 
     update!(displayed_fields: columns)
 
@@ -125,7 +128,8 @@ class ProcedurePresentation < ApplicationRecord
   end
 
   def update_sort(column_id, order)
-    column = procedure.find_column(id: column_id)
+    h_id = JSON.parse(column_id, symbolize_names: true)
+    column = procedure.find_column(h_id:)
 
     update!(sort: {
       TABLE => column.table,