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
|
module ActiveRecord
module Associations
class HasManyAssociation < AssociationCollection #:nodoc:
def initialize(owner, association_name, association_class_name, association_class_primary_key_name, options)
super
@conditions = sanitize_sql(options[:conditions])
construct_sql
end
def build(attributes = {})
if attributes.is_a?(Array)
attributes.collect { |attr| create(attr) }
else
load_target
record = @association_class.new(attributes)
record[@association_class_primary_key_name] = @owner.id unless @owner.new_record?
@target << record
record
end
end
def find_all(runtime_conditions = nil, orderings = nil, limit = nil, joins = nil)
if @options[:finder_sql]
records = @association_class.find_by_sql(@finder_sql)
else
sql = @finder_sql.dup
sql << " AND #{sanitize_sql(runtime_conditions)}" if runtime_conditions
orderings ||= @options[:order]
records = @association_class.find_all(sql, orderings, limit, joins)
end
end
# Count the number of associated records. All arguments are optional.
def count(runtime_conditions = nil)
if @options[:finder_sql]
@association_class.count_by_sql(@finder_sql)
else
sql = @finder_sql
sql << " AND #{sanitize_sql(runtime_conditions)}" if runtime_conditions
@association_class.count(sql)
end
end
# Find the first associated record. All arguments are optional.
def find_first(conditions = nil, orderings = nil)
find_all(conditions, orderings, 1).first
end
def find(*args)
# Return an Array if multiple ids are given.
expects_array = args.first.kind_of?(Array)
ids = args.flatten.compact.uniq
# If no ids given, raise RecordNotFound.
if ids.empty?
raise RecordNotFound, "Couldn't find #{@association_class.name} without an ID"
# If using a custom finder_sql, scan the entire collection.
elsif @options[:finder_sql]
if ids.size == 1
id = ids.first
record = load_target.detect { |record| id == record.id }
expects_array? ? [record] : record
else
load_target.select { |record| ids.include?(record.id) }
end
# Otherwise, delegate to association class with conditions.
else
args << { :conditions => "#{@association_class_primary_key_name} = #{@owner.quoted_id} #{@conditions ? " AND " + @conditions : ""}" }
@association_class.find(*args)
end
end
# Removes all records from this association. Returns +self+ so
# method calls may be chained.
def clear
@association_class.update_all("#{@association_class_primary_key_name} = NULL", "#{@association_class_primary_key_name} = #{@owner.quoted_id}")
@target = []
self
end
protected
def find_target
find_all
end
def count_records
if has_cached_counter?
@owner.send(:read_attribute, cached_counter_attribute_name)
elsif @options[:counter_sql]
@association_class.count_by_sql(@counter_sql)
else
@association_class.count(@counter_sql)
end
end
def has_cached_counter?
@owner.attribute_present?(cached_counter_attribute_name)
end
def cached_counter_attribute_name
"#{@association_name}_count"
end
def insert_record(record)
record[@association_class_primary_key_name] = @owner.id
record.save
end
def delete_records(records)
ids = quoted_record_ids(records)
@association_class.update_all(
"#{@association_class_primary_key_name} = NULL",
"#{@association_class_primary_key_name} = #{@owner.quoted_id} AND #{@association_class.primary_key} IN (#{ids})"
)
end
def target_obsolete?
false
end
def construct_sql
if @options[:finder_sql]
@finder_sql = interpolate_sql(@options[:finder_sql])
else
@finder_sql = "#{@association_class_primary_key_name} = #{@owner.quoted_id}"
@finder_sql << " AND #{interpolate_sql(@conditions)}" if @conditions
end
if @options[:counter_sql]
@counter_sql = interpolate_sql(@options[:counter_sql])
elsif @options[:finder_sql]
@options[:counter_sql] = @options[:finder_sql].gsub(/SELECT (.*) FROM/i, "SELECT COUNT(*) FROM")
@counter_sql = interpolate_sql(@options[:counter_sql])
else
@counter_sql = "#{@association_class_primary_key_name} = #{@owner.quoted_id}"
@counter_sql << " AND #{interpolate_sql(@conditions)}" if @conditions
end
end
end
end
end
|
