Factory.js
7.59 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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
module.exports.Factory = function(Sequelize, sequelize) {
var Factory = {
addManyToManyMethods: function(table1, table2, assocName, backAssocName) {
table1.prototype[Sequelize.Helper.SQL.addPrefix('get', assocName)] = Factory.createManyToManyGetter(table1, table2, assocName, backAssocName)
table1.prototype[Sequelize.Helper.SQL.addPrefix('set', assocName)] = Factory.createManyToManySetter(table1, table2, assocName, backAssocName)
},
addOneToManyMethods: function(table1, table2, assocName, methodName) {
var setterName = Sequelize.Helper.SQL.addPrefix('set', methodName || assocName),
getterName = Sequelize.Helper.SQL.addPrefix('get', methodName || assocName)
table1.prototype[setterName] = Factory.createOneToManySetter(table1, assocName, methodName)
table1.prototype[getterName] = Factory.createOneToManyGetter(table1, table2, assocName)
},
addOneToOneMethods: function(table1, table2, assocName, backAssocName) {
var setterName = Sequelize.Helper.SQL.addPrefix('set', backAssocName || assocName),
getterName = Sequelize.Helper.SQL.addPrefix('get', backAssocName || assocName)
// getter
table1.prototype[getterName] = function(callback) {
var whereConditions = {}
whereConditions[Sequelize.Helper.SQL.asTableIdentifier(assocName)] = this.id
table2.find(whereConditions, callback)
}
// setter
table1.prototype[setterName] = function(object, callback) {
var self = this
this[Sequelize.Helper.SQL.addPrefix('get', backAssocName)](function(currentAssociation) {
var attr = {}
if(currentAssociation == null) {
attr[Sequelize.Helper.SQL.asTableIdentifier(assocName)] = self.id
object.updateAttributes(attr, callback)
} else {
if(object.id == currentAssociation.id) callback(currentAssociation)
else {
// first update the currently associated item to have no association any more
attr[Sequelize.Helper.SQL.asTableIdentifier(assocName)] = null
currentAssociation.updateAttributes(attr, function() {
// now update the object itself to set the new association
attr[Sequelize.Helper.SQL.asTableIdentifier(assocName)] = self.id
object.updateAttributes(attr, callback)
})
}
}
})
}
},
createManyToManyGetter: function(table1, table2, assocName, backAssocName) {
return function(callback) {
var Association = sequelize.tables[Sequelize.Helper.SQL.manyToManyTableName(assocName, backAssocName)].klass,
assocNameAsTableIdentifier = Sequelize.Helper.SQL.asTableIdentifier(backAssocName),
whereConditions = [assocNameAsTableIdentifier, this.id].join("=")
Association.findAll({ where: whereConditions }, function(result) {
if(result.length > 0) {
var ids = Sequelize.Helper.Array.map(result, function(resultSet) {
return resultSet[Sequelize.Helper.SQL.asTableIdentifier(assocName)]
})
table2.findAll({where: "id IN (" + ids.join(",") + ")"}, callback)
} else {
if(callback) callback([])
}
})
}
},
createManyToManySetter: function(table1, table2, assocName, backAssocName) {
return function(objects, callback) {
var self = this,
Association = sequelize.tables[Sequelize.Helper.SQL.manyToManyTableName(assocName, backAssocName)].klass,
objectIds = Sequelize.Helper.Array.map(objects, function(obj) { return obj.id })
var getAssociatedObjects = function(callback) {
self[Sequelize.Helper.SQL.addPrefix('get', assocName)](callback)
}
var deleteObsoleteAssociations = function(currentAssociations, callback) {
var obsoleteAssociations = Sequelize.Helper.Array.select(currentAssociations, function(assoc) { return objectIds.indexOf(assoc.id) == -1 }),
obsoleteIds = Sequelize.Helper.Array.map(obsoleteAssociations, function(assoc) { return assoc.id })
if(obsoleteIds.length == 0)
callback([])
else {
var deleteOptions = {
table: Association.tableName,
where: Sequelize.Helper.SQL.asTableIdentifier(assocName) + " IN (" + obsoleteIds.join(",") + ") AND " +
Sequelize.Helper.SQL.asTableIdentifier(backAssocName) + " = " + self.id,
limit: null
}
sequelize.query( Sequelize.sqlQueryFor('delete', deleteOptions), function(){ callback(obsoleteIds) } )
}
}
var createNewAssociations = function(currentAssociations, obsoleteIds) {
var currentIds = Sequelize.Helper.Array.map(currentAssociations, function(assoc) { return assoc.id }),
withoutExisting = Sequelize.Helper.Array.select(objects, function(o) { return currentIds.indexOf(o.id) == -1 }),
savings = []
withoutExisting.forEach(function(o) {
if((o instanceof table2) && (self.id != null) && (o.id != null)) {
var attributes = {}
attributes[Sequelize.Helper.SQL.asTableIdentifier(backAssocName)] = self.id
attributes[Sequelize.Helper.SQL.asTableIdentifier(assocName)] = o.id
savings.push({save: new Association(attributes)})
}
})
Sequelize.chainQueries(savings, function() {
getAssociatedObjects(callback)
})
}
getAssociatedObjects(function(associatedObjects) {
deleteObsoleteAssociations(associatedObjects, function(obsolete) {
createNewAssociations(associatedObjects, obsolete)
})
})
}
},
createOneToManyGetter: function(table1, table2, assocName) {
return function(callback) {
var whereConditions = [Sequelize.Helper.SQL.asTableIdentifier(assocName), this.id].join("=")
table2.findAll({where: whereConditions}, callback)
}
},
createOneToManySetter: function(table1, assocName, methodName) {
return function(objects, callback) {
var self = this,
objectIds = Sequelize.Helper.Array.map(objects, function(obj) { return obj.id })
Sequelize.Helper.log(this)
this[Sequelize.Helper.SQL.addPrefix('get', methodName)](function(currentAssociations) {
var currentIds = Sequelize.Helper.Array.map(currentAssociations, function(assoc) { return assoc.id }),
obsoleteAssociations = Sequelize.Helper.Array.select(currentAssociations, function(assoc) { return objectsIds.indexOf(assoc.id) == -1 }),
queries = []
obsoleteAssociations.forEach(function(assoc) {
var attr = {}
attr[Sequelize.Helper.SQL.asTableIdentifier(assocName)] = null
queries.push({updateAttributes: assoc, params: [attr]})
})
var newAssociations = Sequelize.Helper.Array.select(objects, function(o) { return currentIds.indexOf(o.id) == -1 })
newAssociations.forEach(function(assoc) {
var attr = {}
attr[Sequelize.Helper.SQL.asTableIdentifier(assocName)] = self.id
queries.push({updateAttributes: assoc, params: [attr]})
})
Sequelize.chainQueries(queries, function() {
self[Sequelize.Helper.SQL.addPrefix('get', methodName)](callback)
})
})
}
}
}
return Factory
}