1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358
|
class ActiveRecord::ConnectionAdapters::NullDBAdapter < ActiveRecord::ConnectionAdapters::AbstractAdapter
# A convenience method for integratinginto RSpec. See README for example of
# use.
def self.insinuate_into_spec(config)
config.before :all do
ActiveRecord::Base.establish_connection(:adapter => :nulldb)
end
config.after :all do
ActiveRecord::Base.establish_connection(:test)
end
end
# Recognized options:
#
# [+:schema+] path to the schema file, relative to Rails.root
# [+:table_definition_class_name+] table definition class
# (e.g. ActiveRecord::ConnectionAdapters::PostgreSQL::TableDefinition for Postgres) or nil.
def initialize(config={})
@log = StringIO.new
@logger = Logger.new(@log)
@last_unique_id = 0
@tables = {'schema_info' => new_table_definition(nil)}
@indexes = Hash.new { |hash, key| hash[key] = [] }
@schema_path = config.fetch(:schema){ "db/schema.rb" }
@config = config.merge(:adapter => :nulldb)
super *initialize_args
@visitor ||= Arel::Visitors::ToSql.new self if defined?(Arel::Visitors::ToSql)
if config[:table_definition_class_name]
ActiveRecord::ConnectionAdapters::NullDBAdapter.send(:remove_const, 'TableDefinition')
ActiveRecord::ConnectionAdapters::NullDBAdapter.const_set('TableDefinition',
self.class.const_get(config[:table_definition_class_name]))
end
register_types unless NullDB::LEGACY_ACTIVERECORD || \
ActiveRecord::VERSION::MAJOR < 4
end
# A log of every statement that has been "executed" by this connection adapter
# instance.
def execution_log
(@execution_log ||= [])
end
# A log of every statement that has been "executed" since the last time
# #checkpoint! was called, or since the connection was created.
def execution_log_since_checkpoint
checkpoint_index = @execution_log.rindex(Checkpoint.new)
checkpoint_index = checkpoint_index ? checkpoint_index + 1 : 0
@execution_log[(checkpoint_index..-1)]
end
# Inserts a checkpoint in the log. See also #execution_log_since_checkpoint.
def checkpoint!
self.execution_log << Checkpoint.new
end
def adapter_name
"NullDB"
end
def supports_migrations?
true
end
def create_table(table_name, options = {})
table_definition = new_table_definition(self, table_name, options.delete(:temporary), options)
unless options[:id] == false
table_definition.primary_key(options[:primary_key] || "id")
end
yield table_definition if block_given?
@tables[table_name] = table_definition
end
def add_index(table_name, column_names, options = {})
column_names = Array.wrap(column_names).map(&:to_s)
index_name, index_type, ignore = add_index_options(table_name, column_names, options)
@indexes[table_name] << IndexDefinition.new(table_name, index_name, (index_type == 'UNIQUE'), column_names, [], [])
end
unless instance_methods.include? :add_index_options
def add_index_options(table_name, column_name, options = {})
column_names = Array.wrap(column_name)
index_name = index_name(table_name, :column => column_names)
if Hash === options # legacy support, since this param was a string
index_type = options[:unique] ? "UNIQUE" : ""
index_name = options[:name].to_s if options.key?(:name)
else
index_type = options
end
if index_name.length > index_name_length
raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' is too long; the limit is #{index_name_length} characters"
end
if index_name_exists?(table_name, index_name, false)
raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' already exists"
end
index_columns = quoted_columns_for_index(column_names, options).join(", ")
[index_name, index_type, index_columns]
end
end
unless instance_methods.include? :index_name_exists?
def index_name_exists?(table_name, index_name, default)
return default unless respond_to?(:indexes)
index_name = index_name.to_s
indexes(table_name).detect { |i| i.name == index_name }
end
end
def add_fk_constraint(*args)
# NOOP
end
def add_pk_constraint(*args)
# NOOP
end
def enable_extension(*)
# NOOP
end
# Retrieve the table names defined by the schema
def tables
@tables.keys.map(&:to_s)
end
def views
[] # TODO: Implement properly if needed - This is new method in rails
end
# Retrieve table columns as defined by the schema
def columns(table_name, name = nil)
if @tables.size <= 1
ActiveRecord::Migration.verbose = false
schema_path = if Pathname(@schema_path).absolute?
@schema_path
else
File.join(NullDB.configuration.project_root, @schema_path)
end
Kernel.load(schema_path)
end
if table = @tables[table_name]
table.columns.map do |col_def|
col_args = new_column_arguments(col_def)
ActiveRecord::ConnectionAdapters::NullDBAdapter::Column.new(*col_args)
end
else
[]
end
end
# Retrieve table indexes as defined by the schema
def indexes(table_name, name = nil)
@indexes[table_name]
end
def execute(statement, name = nil)
self.execution_log << Statement.new(entry_point, statement)
NullObject.new
end
def exec_query(statement, name = 'SQL', binds = [], options = {})
self.execution_log << Statement.new(entry_point, statement)
EmptyResult.new
end
def select_rows(statement, name = nil, binds = [])
[].tap do
self.execution_log << Statement.new(entry_point, statement)
end
end
def insert(statement, name = nil, primary_key = nil, object_id = nil, sequence_name = nil, binds = [])
(object_id || next_unique_id).tap do
with_entry_point(:insert) do
super(statement, name, primary_key, object_id, sequence_name)
end
end
end
alias :create :insert
def update(statement, name=nil, binds = [])
with_entry_point(:update) do
super(statement, name)
end
end
def delete(statement, name=nil, binds = [])
with_entry_point(:delete) do
super(statement, name).size
end
end
def select_all(statement, name=nil, binds = [], options = {})
with_entry_point(:select_all) do
super(statement, name)
end
end
def select_one(statement, name=nil, binds = [])
with_entry_point(:select_one) do
super(statement, name)
end
end
def select_value(statement, name=nil, binds = [])
with_entry_point(:select_value) do
super(statement, name)
end
end
def select_values(statement, name=nil)
with_entry_point(:select_values) do
super(statement, name)
end
end
def primary_key(table_name)
columns(table_name).detect { |col| col.sql_type == :primary_key }.try(:name)
end
protected
def select(statement, name = nil, binds = [])
EmptyResult.new.tap do |r|
r.bind_column_meta(columns_for(name))
self.execution_log << Statement.new(entry_point, statement)
end
end
private
def columns_for(table_name)
table_meta = @tables[table_name]
return [] unless table_meta
table_meta.columns
end
def next_unique_id
@last_unique_id += 1
end
def with_entry_point(method)
if entry_point.nil?
with_thread_local_variable(:entry_point, method) do
yield
end
else
yield
end
end
def entry_point
Thread.current[:entry_point]
end
def with_thread_local_variable(name, value)
old_value = Thread.current[name]
Thread.current[name] = value
begin
yield
ensure
Thread.current[name] = old_value
end
end
def includes_column?
false
end
def new_table_definition(adapter = nil, table_name = nil, is_temporary = nil, options = {})
case ::ActiveRecord::VERSION::MAJOR
when 6
TableDefinition.new(self, table_name, temporary: is_temporary, options: options.except(:id))
when 5
TableDefinition.new(table_name, is_temporary, options.except(:id), nil)
when 4
TableDefinition.new(native_database_types, table_name, is_temporary, options)
when 2,3
TableDefinition.new(adapter)
else
raise "Unsupported ActiveRecord version #{::ActiveRecord::VERSION::STRING}"
end
end
def new_column_arguments(col_def)
args_with_optional_cast_type(col_def)
end
def args_with_optional_cast_type(col_def)
default_column_arguments(col_def).tap do |args|
if defined?(ActiveRecord::ConnectionAdapters::SqlTypeMetadata)
meta = ActiveRecord::ConnectionAdapters::SqlTypeMetadata.new(sql_type: col_def.type)
args.insert(2, meta_with_limit!(meta, col_def))
elsif initialize_column_with_cast_type?
args.insert(2, meta_with_limit!(lookup_cast_type(col_def.type), col_def))
else
args[2] = args[2].to_s + "(#{col_def.limit})" if col_def.limit
end
end
end
def meta_with_limit!(meta, col_def)
meta.instance_variable_set('@limit', col_def.limit)
meta
end
def default_column_arguments(col_def)
if ActiveRecord::VERSION::MAJOR >= 5
[
col_def.name.to_s,
col_def.default,
col_def.null.nil? || col_def.null # cast [false, nil, true] => [false, true, true], other adapters default to null=true
]
else
[
col_def.name.to_s,
col_def.default,
col_def.type,
col_def.null.nil? || col_def.null # cast [false, nil, true] => [false, true, true], other adapters default to null=true
]
end
end
def initialize_column_with_cast_type?
::ActiveRecord::VERSION::MAJOR == 4 && ::ActiveRecord::VERSION::MINOR >= 2
end
def initialize_args
return [nil, @logger, @config] if ActiveRecord::VERSION::MAJOR > 3
[nil, @logger]
end
# 4.2 introduced ActiveRecord::Type
# https://github.com/rails/rails/tree/4-2-stable/activerecord/lib/active_record
def register_types
if ActiveRecord::VERSION::MAJOR < 5
type_map.register_type(:primary_key, ActiveRecord::Type::Integer.new)
else
require 'active_model/type'
ActiveRecord::Type.register(
:primary_key,
ActiveModel::Type::Integer,
adapter: adapter_name,
override: true
)
end
end
end
|