Gemfile.lock got updated after installation (now it uses updated version of the gem, postgres_upsert (2.0.0))
Pass table name instead of AR class into a writer and evaluate primary_key and column_names with PostgreSQL
options[:table] is obsolete now as we pass table_name as a mandatory parameter
Renamed `get_table_name` into `quoted_table_name` for better understanding
Cached `quoted_table_name` in an instance variable
Removed redundant assignment and always truthy `if` clause
Bump major version "3.0.0" because `Writer#initialize` signature was changed: now it accepts String as a first parameter instead of instance of ActiveRecord::Base
Merge pull request #2 from simsalabim/feature/accept-table-name-as-param-instead-of-ar-model

Feature/accept table name as param instead of ar model