Create a data model using object-oriented

Let's take a look at the following code to understand the object orientation. The information here is large.

4 * object. create () has recently been added to the ecmascript 5th specification. Some browsers do not support 5 * simulating an object here. the create method solves compatibility issues 6 * object. create: This method has only one parameter, namely the prototype object. 7 * the prototype of the new object is the input parameter. That is, an object is input, and a new object 8 */9 10 if (typeof object. Create! = "Function") {11 object. create = function (o) {12 function f () {} 13 F. prototype = O; 14 return F (); 15} 16} 17 18/** 19 * simple and clear guid Generator for Automatic Generation of IDS, added IDs of 20 */21 math to save instance records. guid = function () {22 return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx '. replace (/[XY]/g, function (c) {23 var r = math. random () * 16 | 0; 24 var v = c = 'X '? R: (R & 0x3 | 0x8); 25 return v. tostring (16); 26 }). touppercase (); 27}; 28 29/** 30 * creat a object from here, create an object model. Note that the model here is mounted to the object base class, 31 */32 VAR model = {33 inherited: function () {}, 34 created: function () {}, 35 36 prototype: {37 init: function () {} 38}, 39 // This function returns a new object, this object inherits from model object 40 // we use it to create a model 41 create: function () {42 var object = object. creat E (this); 43 object. parent = This; 44 object. prototype = object. fn = object. create (this. prototype); 45 46 object. created (); 47 This. inherited (); 48 This. inherited (object); 49 50 return object; 51}, 52 // This function will initialize and return a new object 53 // It inherits from model. prototype, for example, an instance of the model object 54 init: function () {55 var instance = object. create (this. prototype); 56 instance. parent = This; 57 instance. init. apply (instance, argument S); 58 59 return instance; 60}, 61 // This method extends multiple attributes for the model object 62 extend: function (o) {63 var extented = O. extended; 64 65 $. extend (this, O); 66 If (extented) {67 extented (this); 68} 69}, 70 // This method is for model object extended instance attributes 71 include: function (o) {72 var encoded DED = O. included; 73 74 $. extend (this. prototype, O); 75 if (included) {76 included ded (this); 77} 78} 79}; 80 81 // we need to keep the record persistent, you can add a newly created instance to this object when saving it. 82 // When deleting an instance, delete it from the object 83 model. records ={}; 84 model. include ({85 newrecord: True, 86 // create a isntance 87 create: function () {88 this. newrecord = false; 89 This. parent. records [this. id] = This; 90}, 91 // delete a instance 92 destroy: function () {93 delete this. parent. records [this. id]; 94}, 95 // update a instance existed 96 update: function () {97 This. parent. records [this. id] = this; 98}, 99 // save a instance100 save: function () {101 this. newrecord? This. create (): This. update (); 102}, 103 init: function (ATTS) {104 /*... */105}, 106 load: function (attributes) {107 /*... */108} 109 110}); 111/** 112 * added ID support 113 */114 model. extend ({115 // search a instance by id116 find: function (ID) {117 return this. records [ID]; 118} 119 create: function () {120 If (! This. ID) {121 this. id = math. GUID (); 122} 123 this. newrecord = true; 124 this. parent. records [this. id] = This; 125} 126}); 127 128/** 129 * For test130 */131 var asset = model. create (); 132 var user = model. create (); 133 134 var user = user. init (); 135 136 var asset = asset. init (); 137 asset. name = "Same, same"; 138 asset. id = 1; 139 asset. save (); 140 141 var asset2 = asset. init (); 142 asset2.name = "but different"; 143 asset2.id = 2; 144 asset2.save (); 145 146 147 </SCRIPT>