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210 lines
5.9 KiB
Ruby
210 lines
5.9 KiB
Ruby
require 'rails_helper'
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require_dependency 'migration/column_dropper'
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RSpec.describe Migration::ColumnDropper do
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def has_column?(table, column)
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DB.exec(<<~SQL, table: table, column: column) == 1
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SELECT 1
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FROM INFORMATION_SCHEMA.COLUMNS
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WHERE
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table_schema = 'public' AND
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table_name = :table AND
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column_name = :column
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SQL
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end
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def update_first_migration_date(created_at)
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DB.exec(<<~SQL, created_at: created_at)
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UPDATE schema_migration_details
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SET created_at = :created_at
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WHERE id = (SELECT MIN(id)
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FROM schema_migration_details)
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SQL
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end
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describe ".drop" do
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let(:migration_name) do
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DB.query_single("SELECT name FROM schema_migration_details ORDER BY id DESC LIMIT 1").first
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end
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before do
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DB.exec "ALTER TABLE topics ADD COLUMN junk int"
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DB.exec(<<~SQL, name: migration_name, created_at: 15.minutes.ago)
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UPDATE schema_migration_details
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SET created_at = :created_at
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WHERE name = :name
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SQL
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end
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it "can correctly drop columns after correct delay" do
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dropped_proc_called = false
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after_dropped_proc_called = false
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update_first_migration_date(2.years.ago)
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Migration::ColumnDropper.drop(
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table: 'topics',
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after_migration: migration_name,
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columns: ['junk'],
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delay: 20.minutes,
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on_drop: ->() { dropped_proc_called = true },
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after_drop: ->() { after_dropped_proc_called = true }
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)
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expect(has_column?('topics', 'junk')).to eq(true)
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expect(dropped_proc_called).to eq(false)
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expect(dropped_proc_called).to eq(false)
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Migration::ColumnDropper.drop(
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table: 'topics',
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after_migration: migration_name,
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columns: ['junk'],
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delay: 10.minutes,
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on_drop: ->() { dropped_proc_called = true },
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after_drop: ->() { after_dropped_proc_called = true }
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)
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expect(has_column?('topics', 'junk')).to eq(false)
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expect(dropped_proc_called).to eq(true)
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expect(after_dropped_proc_called).to eq(true)
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dropped_proc_called = false
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after_dropped_proc_called = false
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Migration::ColumnDropper.drop(
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table: 'topics',
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after_migration: migration_name,
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columns: ['junk'],
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delay: 10.minutes,
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on_drop: ->() { dropped_proc_called = true },
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after_drop: ->() { after_dropped_proc_called = true }
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)
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# it should call "on_drop" only when there are columns to drop
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expect(dropped_proc_called).to eq(false)
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expect(after_dropped_proc_called).to eq(false)
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end
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it "drops the columns immediately if the first migration was less than 10 minutes ago" do
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dropped_proc_called = false
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update_first_migration_date(11.minutes.ago)
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Migration::ColumnDropper.drop(
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table: 'topics',
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after_migration: migration_name,
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columns: ['junk'],
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delay: 30.minutes,
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on_drop: ->() { dropped_proc_called = true }
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)
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expect(has_column?('topics', 'junk')).to eq(true)
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expect(dropped_proc_called).to eq(false)
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update_first_migration_date(9.minutes.ago)
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Migration::ColumnDropper.drop(
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table: 'topics',
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after_migration: migration_name,
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columns: ['junk'],
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delay: 30.minutes,
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on_drop: ->() { dropped_proc_called = true }
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)
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expect(has_column?('topics', 'junk')).to eq(false)
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expect(dropped_proc_called).to eq(true)
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end
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end
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describe '.mark_readonly' do
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let(:table_name) { "table_with_readonly_column" }
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before do
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DB.exec <<~SQL
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CREATE TABLE #{table_name} (topic_id INTEGER, email TEXT);
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INSERT INTO #{table_name} (topic_id, email)
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VALUES (1, 'something@email.com');
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SQL
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Migration::ColumnDropper.mark_readonly(table_name, 'email')
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end
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after do
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ActiveRecord::Base.connection.reset!
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DB.exec <<~SQL
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DROP TABLE IF EXISTS #{table_name};
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DROP TRIGGER IF EXISTS #{table_name}_email_readonly ON #{table_name};
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SQL
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end
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it 'should be droppable' do
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name = DB.query_single("SELECT name FROM schema_migration_details LIMIT 1").first
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dropped_proc_called = false
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Migration::ColumnDropper.drop(
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table: table_name,
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after_migration: name,
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columns: ['email'],
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delay: 0.minutes,
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on_drop: ->() { dropped_proc_called = true }
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)
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expect(dropped_proc_called).to eq(true)
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end
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it 'should prevent updates to the readonly column' do
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begin
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DB.exec <<~SQL
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UPDATE #{table_name}
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SET email = 'testing@email.com'
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WHERE topic_id = 1;
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SQL
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rescue PG::RaiseException => e
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[
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"Discourse: email in #{table_name} is readonly",
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'discourse_functions.raise_table_with_readonly_column_email_readonly()'
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].each do |message|
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expect(e.message).to include(message)
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end
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end
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end
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it 'should allow updates to the other columns' do
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DB.exec <<~SQL
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UPDATE #{table_name}
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SET topic_id = 2
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WHERE topic_id = 1
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SQL
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expect(
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ActiveRecord::Base.exec_sql("SELECT * FROM #{table_name};").values
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).to include([2, "something@email.com"])
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end
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it 'should prevent insertions to the readonly column' do
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expect do
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ActiveRecord::Base.connection.raw_connection.exec <<~SQL
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INSERT INTO #{table_name} (topic_id, email)
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VALUES (2, 'something@email.com');
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SQL
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end.to raise_error(
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PG::RaiseException,
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/Discourse: email in table_with_readonly_column is readonly/
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)
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end
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it 'should allow insertions to the other columns' do
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DB.exec <<~SQL
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INSERT INTO #{table_name} (topic_id)
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VALUES (2);
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SQL
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expect(
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DB.query_single("SELECT topic_id FROM #{table_name} WHERE topic_id = 2")
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).to eq([2])
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end
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end
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end
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