Class: TestProf::AnyFixture::Dump::PostgreSQL

Inherits:
BaseAdapter
  • Object
show all
Defined in:
lib/test_prof/any_fixture/dump/postgresql.rb

Constant Summary collapse

UUID_FUNCTIONS = 
%w[
  gen_random_uuid
  uuid_generate_v4
]

Instance Method Summary collapse

Instance Method Details

#compile_sql(sql, binds) ⇒ Object 



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# File 'lib/test_prof/any_fixture/dump/postgresql.rb', line 25

def compile_sql(sql, binds)
  sql.gsub(/\$\d+/) { binds.shift.gsub("\n", "' || chr(10) || '") }
end

#import(path) ⇒ Object 



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# File 'lib/test_prof/any_fixture/dump/postgresql.rb', line 29

def import(path)
  # Test if psql is installed
  `psql --version`

  tasks = ActiveRecord::Tasks::PostgreSQLDatabaseTasks.new(config)

  while_disconnected do
    tasks.structure_load(path, "--output=/dev/null")
  end

  true
rescue Errno::ENOENT
  false
end

#reset_sequence!(table_name, start) ⇒ Object 



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# File 'lib/test_prof/any_fixture/dump/postgresql.rb', line 14

def reset_sequence!(table_name, start)
  _pk, sequence = conn.pk_and_sequence_for(table_name)
  return unless sequence

  sequence_name = "#{sequence.schema}.#{sequence.identifier}"

  execute <<~SQL
    ALTER SEQUENCE #{sequence_name} RESTART WITH #{start}; -- any_fixture:dump
  SQL
end

#setup_env ⇒ Object 



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# File 'lib/test_prof/any_fixture/dump/postgresql.rb', line 44

def setup_env
  # Mock UUID generating functions to provide consistent results
  quoted_functions = UUID_FUNCTIONS.map { |func| "'#{func}'" }.join(", ")

  @uuid_funcs = execute <<~SQL
    SELECT
      pp.proname, pn.nspname,
      pg_get_functiondef(pp.oid) AS definition
    FROM pg_proc pp
    JOIN pg_namespace pn
      ON pn.oid = pp.pronamespace
    WHERE pp.proname in (#{quoted_functions})
    ORDER BY pp.oid;
  SQL

  uuid_funcs.each do |(func, ns, _)|
    execute <<~SQL
      CREATE OR REPLACE FUNCTION #{ns}.#{func}()
        RETURNS UUID
        LANGUAGE SQL
        AS $$
          SELECT md5(random()::TEXT)::UUID;
        $$; -- any_fixture:dump
    SQL
  end

  execute <<~SQL
    SELECT setseed(#{rand}); -- any_fixture:dump
  SQL
end

#teardown_env ⇒ Object 



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# File 'lib/test_prof/any_fixture/dump/postgresql.rb', line 75

def teardown_env
  uuid_funcs.each do |(func, ns, definition)|
    execute "#{definition}; -- any_fixture:dump"
  end
end