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author | Aidan Haran <aidanharan@yahoo.com> | 2017-12-09 13:41:02 +0000 |
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committer | GitHub <noreply@github.com> | 2017-12-09 13:41:02 +0000 |
commit | 66f34a8ea58c8c98d9cc2651d386c9e5a0789d08 (patch) | |
tree | d24e9014cf9045abc892ba97ac993e2e26e31c7e /activerecord/lib/active_record/connection_adapters/postgresql/column.rb | |
parent | 3291fa3630c456450f8c6a9b771f77c293d036cd (diff) | |
parent | 55d4cf2a9c1a6e77ed7aedb866e964039bb4a143 (diff) | |
download | rails-66f34a8ea58c8c98d9cc2651d386c9e5a0789d08.tar.gz rails-66f34a8ea58c8c98d9cc2651d386c9e5a0789d08.tar.bz2 rails-66f34a8ea58c8c98d9cc2651d386c9e5a0789d08.zip |
Merge branch 'master' into custom-discarded-job-handling
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/postgresql/column.rb')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/postgresql/column.rb | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb index 1b67cee24b..469ef3f5a0 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/column.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/column.rb @@ -7,11 +7,38 @@ module ActiveRecord delegate :array, :oid, :fmod, to: :sql_type_metadata alias :array? :array + def initialize(*, max_identifier_length: 63, **) + super + @max_identifier_length = max_identifier_length + end + def serial? return unless default_function - %r{\Anextval\('"?#{table_name}_#{name}_seq"?'::regclass\)\z} === default_function + if %r{\Anextval\('"?(?<sequence_name>.+_(?<suffix>seq\d*))"?'::regclass\)\z} =~ default_function + sequence_name_from_parts(table_name, name, suffix) == sequence_name + end end + + protected + attr_reader :max_identifier_length + + private + def sequence_name_from_parts(table_name, column_name, suffix) + over_length = [table_name, column_name, suffix].map(&:length).sum + 2 - max_identifier_length + + if over_length > 0 + column_name_length = [(max_identifier_length - suffix.length - 2) / 2, column_name.length].min + over_length -= column_name.length - column_name_length + column_name = column_name[0, column_name_length - [over_length, 0].min] + end + + if over_length > 0 + table_name = table_name[0, table_name.length - over_length] + end + + "#{table_name}_#{column_name}_#{suffix}" + end end end end |