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-rw-r--r--activerecord/lib/active_record/schema_dumper.rb11
-rw-r--r--activerecord/test/cases/schema_dumper_test.rb5
-rw-r--r--activerecord/test/schema/schema.rb1
3 files changed, 15 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/schema_dumper.rb b/activerecord/lib/active_record/schema_dumper.rb
index de530a3456..2d90ef35aa 100644
--- a/activerecord/lib/active_record/schema_dumper.rb
+++ b/activerecord/lib/active_record/schema_dumper.rb
@@ -99,8 +99,15 @@ HEADER
next if column.name == pk
spec = {}
spec[:name] = column.name.inspect
- spec[:type] = column.type.to_s
- spec[:limit] = column.limit.inspect if column.limit != @types[column.type][:limit] && column.type != :decimal
+
+ # AR has an optimisation which handles zero-scale decimals as integers. This
+ # code ensures that the dumper still dumps the column as a decimal.
+ spec[:type] = if column.type == :integer && [/^numeric/, /^decimal/].any? { |e| e.match(column.sql_type) }
+ 'decimal'
+ else
+ column.type.to_s
+ end
+ spec[:limit] = column.limit.inspect if column.limit != @types[column.type][:limit] && spec[:type] != 'decimal'
spec[:precision] = column.precision.inspect if !column.precision.nil?
spec[:scale] = column.scale.inspect if !column.scale.nil?
spec[:null] = 'false' if !column.null
diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index f9ad7f3ba3..4f02be3c06 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -190,4 +190,9 @@ class SchemaDumperTest < ActiveRecord::TestCase
output = stream.string
assert_match %r{:precision => 3,[[:space:]]+:scale => 2,[[:space:]]+:default => 2.78}, output
end
+
+ def test_schema_dump_keeps_large_precision_integer_columns_as_decimal
+ output = standard_dump
+ assert_match %r{t.decimal\s+"atoms_in_universe",\s+:precision => 55,\s+:scale => 0}, output
+ end
end
diff --git a/activerecord/test/schema/schema.rb b/activerecord/test/schema/schema.rb
index 6e8813d8ab..b2aaccb352 100644
--- a/activerecord/test/schema/schema.rb
+++ b/activerecord/test/schema/schema.rb
@@ -273,6 +273,7 @@ ActiveRecord::Schema.define do
t.decimal :my_house_population, :precision => 2, :scale => 0
t.decimal :decimal_number_with_default, :precision => 3, :scale => 2, :default => 2.78
t.float :temperature
+ t.decimal :atoms_in_universe, :precision => 55, :scale => 0
end
create_table :orders, :force => true do |t|