mirror of
https://github.com/discourse/discourse.git
synced 2024-12-16 00:26:29 +08:00
30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
112 lines
3.0 KiB
Ruby
112 lines
3.0 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require_dependency "migration/base_dropper"
|
|
|
|
class DbHelper
|
|
|
|
REMAP_SQL ||= <<~SQL
|
|
SELECT table_name, column_name
|
|
FROM information_schema.columns
|
|
WHERE table_schema = 'public'
|
|
AND is_updatable = 'YES'
|
|
AND (data_type LIKE 'char%' OR data_type LIKE 'text%')
|
|
ORDER BY table_name, column_name
|
|
SQL
|
|
|
|
TRIGGERS_SQL ||= <<~SQL
|
|
SELECT trigger_name
|
|
FROM information_schema.triggers
|
|
WHERE trigger_name LIKE '%_readonly'
|
|
SQL
|
|
|
|
def self.remap(from, to, anchor_left: false, anchor_right: false, excluded_tables: [])
|
|
like = "#{anchor_left ? '' : "%"}#{from}#{anchor_right ? '' : "%"}"
|
|
|
|
triggers = DB.query(TRIGGERS_SQL).map(&:trigger_name).to_set
|
|
|
|
text_columns = Hash.new { |h, k| h[k] = [] }
|
|
|
|
DB.query(REMAP_SQL).each do |r|
|
|
unless triggers.include?(Migration::BaseDropper.readonly_trigger_name(r.table_name, r.column_name))
|
|
text_columns[r.table_name] << r.column_name
|
|
end
|
|
end
|
|
|
|
text_columns.each do |table, columns|
|
|
next if excluded_tables.include?(table)
|
|
|
|
set = columns.map do |column|
|
|
"#{column} = REPLACE(#{column}, :from, :to)"
|
|
end.join(", ")
|
|
|
|
where = columns.map do |column|
|
|
"#{column} IS NOT NULL AND #{column} LIKE :like"
|
|
end.join(" OR ")
|
|
|
|
DB.exec(<<~SQL, from: from, to: to, like: like)
|
|
UPDATE #{table}
|
|
SET #{set}
|
|
WHERE #{where}
|
|
SQL
|
|
end
|
|
|
|
SiteSetting.refresh!
|
|
end
|
|
|
|
def self.regexp_replace(pattern, replacement, flags: "gi", match: "~*", excluded_tables: [])
|
|
triggers = DB.query(TRIGGERS_SQL).map(&:trigger_name).to_set
|
|
|
|
text_columns = Hash.new { |h, k| h[k] = [] }
|
|
|
|
DB.query(REMAP_SQL).each do |r|
|
|
unless triggers.include?(Migration::BaseDropper.readonly_trigger_name(r.table_name, r.column_name))
|
|
text_columns[r.table_name] << r.column_name
|
|
end
|
|
end
|
|
|
|
text_columns.each do |table, columns|
|
|
next if excluded_tables.include?(table)
|
|
|
|
set = columns.map do |column|
|
|
"#{column} = REGEXP_REPLACE(#{column}, :pattern, :replacement, :flags)"
|
|
end.join(", ")
|
|
|
|
where = columns.map do |column|
|
|
"#{column} IS NOT NULL AND #{column} #{match} :pattern"
|
|
end.join(" OR ")
|
|
|
|
DB.exec(<<~SQL, pattern: pattern, replacement: replacement, flags: flags, match: match)
|
|
UPDATE #{table}
|
|
SET #{set}
|
|
WHERE #{where}
|
|
SQL
|
|
end
|
|
|
|
SiteSetting.refresh!
|
|
end
|
|
|
|
def self.find(needle, anchor_left: false, anchor_right: false, excluded_tables: [])
|
|
found = {}
|
|
like = "#{anchor_left ? '' : "%"}#{needle}#{anchor_right ? '' : "%"}"
|
|
|
|
DB.query(REMAP_SQL).each do |r|
|
|
next if excluded_tables.include?(r.table_name)
|
|
|
|
rows = DB.query(<<~SQL, like: like)
|
|
SELECT #{r.column_name}
|
|
FROM #{r.table_name}
|
|
WHERE #{r.column_name} LIKE :like
|
|
SQL
|
|
|
|
if rows.size > 0
|
|
found["#{r.table_name}.#{r.column_name}"] = rows.map do |row|
|
|
row.public_send(r.column_name)
|
|
end
|
|
end
|
|
end
|
|
|
|
found
|
|
end
|
|
|
|
end
|