Add support for DBAGENT_IGNORED_FLUSH_FIELDS

Author: blambeau

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 3.9.7
+
+* DBAGENT_IGNORED_FLUSH_FIELDS allows specifying fields to ignore when db:flush
+  compares data to know whether a table has changed.
+
 ## 3.9.6 - 2025-10-16
 
 * Files dumped by db:flush are now sorted by primary key if possible.

README.md

@@ -36,6 +36,7 @@ See the examples folder for details.
 * `DBAGENT_VIEWPOINT`                  Bmg viewpoint (class name) when using db:flush
 * `DBAGENT_MIGRATIONS_TABLE`           The table containing the list of migrations (defaults to `schema_migrations`)
 * `DBAGENT_SUPERUSER_MIGRATIONS_TABLE` The table containing the list of superuser migrations (defaults to `superuser_migrations`)
+* `DBAGENT_IGNORED_FLUSH_FIELDS`.      Fields ignored when db:flush compares data to dump/skip a table
 
 ## Available rake tasks
 

lib/db_agent/seeder.rb

@@ -9,6 +9,13 @@ def initialize(handler, database_suffix = nil)
     end
     attr_reader :handler, :data_folder, :database_suffix
 
+    def ignored_flush_fields
+      @ignored_flush_fields ||= begin
+        ignored = ENV['DBAGENT_IGNORED_FLUSH_FIELDS'] || ''
+        ignored.split(/\s*,\s*/).map(&:to_sym)
+      end
+    end
+
   end # class Seeder
 end # module DbAgent
 require_relative 'seeder/actions'

lib/db_agent/seeder/relational.rb

@@ -109,8 +109,8 @@ def flush_table(table, target_file, inherit_file)
       def same_data?(inherit_file, data)
         return false unless inherit_file.file?
 
-        r = Bmg.json(inherit_file)
-        s = Bmg.in_memory(data)
+        r = Bmg.json(inherit_file).allbut(ignored_flush_fields)
+        s = Bmg.in_memory(data).allbut(ignored_flush_fields)
         same_set = (r.to_set == s.to_set)
         same_json = !same_set && (r.to_json == s.to_json)
         same_set || same_json