railtie.rb in active_replicas-0.2.1

- old
+ new
@@ -1,24 +1,36 @@
+require 'active_support/core_ext/class/attribute_accessors'
+
 module ActiveReplicas
   class Railtie < Rails::Railtie
     cattr_reader :connection_handler
 
     cattr_accessor :replica_delegated_methods
     cattr_accessor :primary_delegated_methods
 
+    # Reports what the database can handle, see URL for more information:
+    #   https://github.com/rails/rails/blob/master/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb
+    DATABASE_LIMITS_METHODS = [
+      :allowed_index_name_length, :column_name_length,
+      :columns_per_multicolumn_index, :columns_per_table, :in_clause_length,
+      :index_name_length, :indexes_per_table, :joins_per_query,
+      :sql_query_length, :table_alias_length, :table_name_length
+    ]
+
     # All the methods which are safe to be delegated to a replica.
     @@replica_delegated_methods = (
+      DATABASE_LIMITS_METHODS +
       [
         :active?, :cacheable_query, :case_sensitive_comparison,
         :case_sensitive_modifier, :case_insensitive_comparison,
         :clear_query_cache, :column_name_for_operation, :columns,
         :disable_query_cache!, :disconnect!, :enable_query_cache!,
         :exec_query, :prepared_statements, :query_cache_enabled, :quote,
         :quote_column_name, :quote_table_name,
         :quote_table_name_for_assignment, :raw_connection, :reconnect!,
         :sanitize_limit, :schema_cache, :select, :select_all, :select_one,
         :select_rows, :select_value, :select_values, :substitute_at, :to_sql,
-        :type_cast, :valid_type?, :verify!
+        :type_cast, :uncached, :valid_type?, :verify!
       ]
     ).uniq
 
     # Rails methods that translate to SQL DDL (data definition language).
     DDL_METHODS = [