mirror of
https://github.com/discourse/discourse.git
synced 2024-11-27 08:33:39 +08:00
d0d5a138c3
We have the `# frozen_string_literal: true` comment on all our
files. This means all string literals are frozen. There is no need
to call #freeze on any literals.
For files with `# frozen_string_literal: true`
```
puts %w{a b}[0].frozen?
=> true
puts "hi".frozen?
=> true
puts "a #{1} b".frozen?
=> true
puts ("a " + "b").frozen?
=> false
puts (-("a " + "b")).frozen?
=> true
```
For more details see: https://samsaffron.com/archive/2018/02/16/reducing-string-duplication-in-ruby
71 lines
2.0 KiB
Ruby
71 lines
2.0 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Migration
|
|
class BaseDropper
|
|
FUNCTION_SCHEMA_NAME ||= "discourse_functions"
|
|
|
|
def self.create_readonly_function(table_name, column_name = nil)
|
|
DB.exec <<~SQL
|
|
CREATE SCHEMA IF NOT EXISTS #{FUNCTION_SCHEMA_NAME};
|
|
SQL
|
|
|
|
message = column_name ?
|
|
"Discourse: #{column_name} in #{table_name} is readonly" :
|
|
"Discourse: #{table_name} is read only"
|
|
|
|
DB.exec <<~SQL
|
|
CREATE OR REPLACE FUNCTION #{readonly_function_name(table_name, column_name)} RETURNS trigger AS $rcr$
|
|
BEGIN
|
|
RAISE EXCEPTION '#{message}';
|
|
END
|
|
$rcr$ LANGUAGE plpgsql;
|
|
SQL
|
|
end
|
|
|
|
def self.drop_readonly_function(table_name, column_name = nil)
|
|
DB.exec("DROP FUNCTION IF EXISTS #{readonly_function_name(table_name, column_name)} CASCADE")
|
|
end
|
|
|
|
def self.readonly_function_name(table_name, column_name = nil, with_schema: true)
|
|
function_name = [
|
|
"raise",
|
|
table_name,
|
|
column_name,
|
|
"readonly()"
|
|
].compact.join("_")
|
|
|
|
if with_schema && function_schema_exists?
|
|
"#{FUNCTION_SCHEMA_NAME}.#{function_name}"
|
|
else
|
|
function_name
|
|
end
|
|
end
|
|
|
|
def self.old_readonly_function_name(table_name, column_name = nil)
|
|
readonly_function_name(table_name, column_name).sub(
|
|
"#{FUNCTION_SCHEMA_NAME}.", ''
|
|
)
|
|
end
|
|
|
|
def self.readonly_trigger_name(table_name, column_name = nil)
|
|
[table_name, column_name, "readonly"].compact.join("_")
|
|
end
|
|
|
|
def self.function_schema_exists?
|
|
DB.exec(<<~SQL).to_s == '1'
|
|
SELECT schema_name
|
|
FROM information_schema.schemata
|
|
WHERE schema_name = '#{FUNCTION_SCHEMA_NAME}'
|
|
SQL
|
|
end
|
|
|
|
def self.existing_discourse_function_names
|
|
DB.query_single(<<~SQL)
|
|
SELECT routine_name
|
|
FROM information_schema.routines
|
|
WHERE routine_type = 'FUNCTION' AND specific_schema = '#{FUNCTION_SCHEMA_NAME}'
|
|
SQL
|
|
end
|
|
end
|
|
end
|