has-one.js
4.81 KB
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
var Utils = require("./../utils")
, DataTypes = require('./../data-types')
, Helpers = require("./helpers")
, Transaction = require("../transaction")
module.exports = (function() {
var HasOne = function(srcDAO, targetDAO, options) {
this.associationType = 'HasOne'
this.source = srcDAO
this.target = targetDAO
this.options = options
this.isSingleAssociation = true
this.isSelfAssociation = (this.source == this.target)
this.as = this.options.as
if (this.as) {
this.isAliased = true
} else {
this.as = Utils.singularize(this.target.name, this.target.options.language)
}
if (!this.options.foreignKey) {
this.options.foreignKey = Utils._.camelizeIf(
[
Utils._.underscoredIf(this.source.name, this.target.options.underscored),
this.source.primaryKeyAttribute
].join("_"),
!this.source.options.underscored
)
}
this.identifier = this.options.foreignKey
this.sourceIdentifier = this.source.primaryKeyAttribute
this.associationAccessor = this.as
this.options.useHooks = options.useHooks
this.accessors = {
get: Utils._.camelize('get_' + this.as),
set: Utils._.camelize('set_' + this.as),
create: Utils._.camelize('create_' + this.as)
}
}
// the id is in the target table
HasOne.prototype.injectAttributes = function() {
var newAttributes = {}
, keyType = this.source.rawAttributes[this.sourceIdentifier].type
newAttributes[this.identifier] = { type: this.options.keyType || keyType }
Utils._.defaults(this.target.rawAttributes, newAttributes)
if (this.options.constraints !== false) {
this.options.onDelete = this.options.onDelete || 'SET NULL'
this.options.onUpdate = this.options.onUpdate || 'CASCADE'
}
Helpers.addForeignKeyConstraints(this.target.rawAttributes[this.identifier], this.source, this.target, this.options)
// Sync attributes and setters/getters to DAO prototype
this.target.refreshAttributes()
return this
}
HasOne.prototype.injectGetter = function(instancePrototype) {
var association = this
instancePrototype[this.accessors.get] = function(params) {
var where = {}
params = params || {}
params.where = (params.where && [params.where]) || []
where[association.identifier] = this.get(association.sourceIdentifier)
params.where.push(where)
params.where = new Utils.and(params.where)
return association.target.find(params)
}
return this
}
HasOne.prototype.injectSetter = function(instancePrototype) {
var association = this
instancePrototype[this.accessors.set] = function(associatedInstance, options) {
var instance = this
return new Utils.CustomEventEmitter(function(emitter) {
instance[association.accessors.get]()
.success(function(oldInstance) {
if (oldInstance) {
oldInstance[association.identifier] = null
oldInstance
.save(Utils._.extend({}, options, {
fields: [association.identifier],
allowNull: [association.identifier],
association: true
}))
.success(function() {
if (associatedInstance) {
associatedInstance.set(association.identifier, instance.get(association.sourceIdentifier))
associatedInstance.save(options).proxy(emitter)
} else {
emitter.emit('success', null)
}
})
} else {
if (associatedInstance) {
associatedInstance.set(association.identifier, instance.get(association.sourceIdentifier))
associatedInstance.save(options).proxy(emitter)
} else {
emitter.emit('success', null)
}
}
})
.proxy(emitter, { events: ['sql'] })
}).run()
}
return this
}
HasOne.prototype.injectCreator = function(instancePrototype) {
var association = this
instancePrototype[this.accessors.create] = function(values, fieldsOrOptions) {
var instance = this
, options = {}
if ((fieldsOrOptions || {}).transaction instanceof Transaction) {
options.transaction = fieldsOrOptions.transaction
}
return new Utils.CustomEventEmitter(function(emitter) {
association.target
.create(values, fieldsOrOptions)
.proxy(emitter, { events: ['error', 'sql'] })
.success(function(associationInstance) {
instance[association.accessors.set](associationInstance, options)
.proxy(emitter)
})
}).run()
}
return this
};
return HasOne
})()