-
Notifications
You must be signed in to change notification settings - Fork 179
/
base.rb
337 lines (272 loc) · 7.35 KB
/
base.rb
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
module ActiveHash
class RecordNotFound < StandardError
end
class Base
class_inheritable_accessor :data, :dirty
class << self
attr_reader :field_names
def the_meta_class
class << self
self
end
end
def data=(array_of_hashes)
mark_dirty
@records = nil
write_inheritable_attribute(:data, array_of_hashes)
if array_of_hashes
auto_assign_fields(array_of_hashes)
array_of_hashes.each do |hash|
insert new(hash)
end
end
end
def insert(record)
@records ||= []
record.attributes[:id] ||= next_id
mark_dirty
@records << record
end
def next_id
max_record = all.max { |a, b| a.id <=> b.id }
if max_record.nil?
1
elsif max_record.id.is_a?(Numeric)
max_record.id.succ
end
end
def create(attributes = {})
record = new(attributes)
record.save
mark_dirty
record
end
alias_method :add, :create
def create!(attributes = {})
record = new(attributes)
record.save!
record
end
def all(options={})
if options.has_key?(:conditions)
(@records || []).select do |record|
options[:conditions].all? {|col, match| record[col] == match}
end
else
@records || []
end
end
def count
all.length
end
def transaction
yield
rescue ActiveRecord::Rollback
end
def delete_all
mark_dirty
@records = []
end
def find(id, * args)
case id
when nil
nil
when :all
all
when Array
all.select { |record| id.map(& :to_i).include?(record.id) }
else
find_by_id(id) || begin
raise RecordNotFound.new("Couldn't find #{name} with ID=#{id}")
end
end
end
def find_by_id(id)
all.detect { |record| record.id == id.to_i }
end
delegate :first, :last, :to => :all
def fields(* args)
options = args.extract_options!
args.each do |field|
field(field, options)
end
end
def field(field_name, options = {})
@field_names ||= []
@field_names << field_name
define_getter_method(field_name, options[:default])
define_setter_method(field_name)
define_interrogator_method(field_name)
define_custom_find_method(field_name)
define_custom_find_all_method(field_name)
end
def respond_to?(method_name, include_private=false)
super ||
begin
config = configuration_for_custom_finder(method_name)
config && config[:fields].all? do |field|
field_names.include?(field.to_sym) || field.to_sym == :id
end
end
end
def method_missing(method_name, * args)
return super unless respond_to? method_name
config = configuration_for_custom_finder(method_name)
attribute_pairs = config[:fields].zip(args)
matches = all.select { |base| attribute_pairs.all? { |field, value| base.send(field).to_s == value.to_s } }
config[:all?] ? matches : matches.first
end
def configuration_for_custom_finder(finder_name)
if finder_name.to_s.match(/^find_(all_)?by_(.*)/)
{
:all? => !!$1,
:fields => $2.split('_and_')
}
end
end
private :configuration_for_custom_finder
def define_getter_method(field, default_value)
unless instance_methods.include?(field.to_s)
define_method(field) do
attributes[field].nil? ? default_value : attributes[field]
end
end
end
private :define_getter_method
def define_setter_method(field)
method_name = "#{field}="
unless instance_methods.include?(method_name)
define_method(method_name) do |new_val|
attributes[field] = new_val
end
end
end
private :define_setter_method
def define_interrogator_method(field)
method_name = "#{field}?"
unless instance_methods.include?(method_name)
define_method(method_name) do
send(field).present?
end
end
end
private :define_interrogator_method
def define_custom_find_method(field_name)
method_name = "find_by_#{field_name}"
unless singleton_methods.include?(method_name)
the_meta_class.instance_eval do
define_method(method_name) do |name|
all.detect { |record| record.send(field_name) == name }
end
end
end
end
private :define_custom_find_method
def define_custom_find_all_method(field_name)
method_name = "find_all_by_#{field_name}"
unless singleton_methods.include?(method_name)
the_meta_class.instance_eval do
unless singleton_methods.include?(method_name)
define_method(method_name) do |name|
all.select { |record| record.send(field_name) == name }
end
end
end
end
end
private :define_custom_find_all_method
def auto_assign_fields(array_of_hashes)
(array_of_hashes || []).inject([]) do |array, row|
row.symbolize_keys!
row.keys.each do |key|
unless key.to_s == "id"
array << key
end
end
array
end.uniq.each do |key|
field key
end
end
private :auto_assign_fields
# Needed for ActiveRecord polymorphic associations
def base_class
ActiveHash::Base
end
def reload
self.data = read_inheritable_attribute(:data)
mark_clean
end
private :reload
def mark_dirty
self.dirty = true
end
private :mark_dirty
def mark_clean
self.dirty = false
end
private :mark_clean
end
attr_reader :attributes
def initialize(options = {})
options.symbolize_keys!
@attributes = options
options.each do |key, value|
send "#{key}=", value
end
end
def [](key)
attributes[key]
end
def []=(key, val)
attributes[key] = val
end
def id
attributes[:id] ? attributes[:id] : nil
end
def id=(id)
attributes[:id] = id
end
alias quoted_id id
def new_record?
!self.class.all.include?(self)
end
def destroyed?
false
end
def readonly?
true
end
def to_param
id.to_s
end
def eql?(other)
other.instance_of?(self.class) and not id.nil? and (id == other.id)
end
alias == eql?
def hash
id.hash
end
def cache_key
case
when new_record?
"#{self.class.model_name.cache_key}/new"
when timestamp = self[:updated_at]
"#{self.class.model_name.cache_key}/#{id}-#{timestamp.to_s(:number)}"
else
"#{self.class.model_name.cache_key}/#{id}"
end
end
def save
self.class.insert(self)
true
end
alias save! save
def valid?
true
end
def marked_for_destruction?
false
end
end
end