itemfilewritestore.js

这是一个ajax的例子大家好好的看看就是一个鱼眼的效果

				}
			}
			store.fetchItemByIdentity({identity: 10, onError: onError, onItem: onItem});
			return deferred;
		},
		function testReferenceIntegrity_deleteReferencedItemThenRevert(){
			//	summary: 
			//		Simple test to verify the references were properly deleted.
			//	description:
			//		Simple test to verify the references were properly deleted.
		
			var store = new dojo.data.ItemFileWriteStore(tests.data.ItemFileWriteStore.getTestData("reference_integrity"));

			var deferred = new doh.Deferred();
			var passed = true;
			function onError(error, request){
				deferred.errback(error);
			}
			function onItem(item, request){
				try{
					//DO NOT EVER ACCESS THESE VARIABLES LIKE THIS!  
					//THIS IS FOR TESTING INTERNAL STATE!
					console.log("Map before delete:");
					store._dumpReferenceMap();
					var beforeDelete = dojo.toJson(item[store._reverseRefMap]);
					store.deleteItem(item);
					console.log("Map after delete:");
					store._dumpReferenceMap();
					var afterDelete = dojo.toJson(item[store._reverseRefMap]);
					store.revert();
					console.log("Map after revert:");
					store._dumpReferenceMap();
					var afterRevert = dojo.toJson(item[store._reverseRefMap]);
					doh.assertTrue(afterRevert === beforeDelete);
				}catch(e){
					deferred.errback(e);
					passed = false;
				}
				if(passed){
					deferred.callback(true);
				}
			}
			store.fetchItemByIdentity({identity: 10, onError: onError, onItem: onItem});
			return deferred;
		},
		function testReferenceIntegrity_deleteMultipleItemsWithReferencesAndRevert(){
			//	summary: 
			//		Simple test to verify that a flow of deleting items with references and reverting does not damage the internal structure.
			//		Created for tracker bug: #5743
			//	description:
			//		Simple test to verify that a flow of deleting items with references and reverting does not damage the internal structure.
			//		Created for tracker bug: #5743
		
			var store = new dojo.data.ItemFileWriteStore(tests.data.readOnlyItemFileTestTemplates.getTestData("countries_references"));

			var deferred = new doh.Deferred();
			var passed = true;
			function onError(error, request){
				deferred.errback(error);
				doh.assertTrue(false);
			}
			function onItem(item, request){
				//Save off the located item, then locate another one (peer to Egypt)
				doh.assertTrue(store.isItem(item));
				var egypt = item;

				function onItem2(item, request){
					doh.assertTrue(store.isItem(item));
					var nairobi = item;

					//Delete them
					store.deleteItem(egypt);
					store.deleteItem(nairobi);
					try{
						//Revert, then do a fetch.  If the internals have been damaged, this will generally
						//cause onError to fire instead of onComplete.
						store.revert();
						function onComplete(items, request){
							deferred.callback(true);
						}
						store.fetch({query: {name: "*"}, start: 0, count: 20, onComplete: onComplete, onError: onError});
					}catch(e){
						deferred.errback(e)
					}
				}
				store.fetchItemByIdentity({identity: "Nairobi", onError: onError, onItem: onItem2});
			}
			store.fetchItemByIdentity({identity: "Egypt", onError: onError, onItem: onItem});
			return deferred;
		},
		function testReferenceIntegrity_removeReferenceFromAttribute(){
			//	summary: 
			//		Simple test to verify the reference removal updates the internal map.
			//	description:
			//		Simple test to verify the reference removal updates the internal map.
		
			var store = new dojo.data.ItemFileWriteStore(tests.data.ItemFileWriteStore.getTestData("reference_integrity"));

			var deferred = new doh.Deferred();
			var passed = true;
			function onError(error, request){
				deferred.errback(error);
				doh.assertTrue(false);
			}
			function onItem(item, request){
				try{
					store.setValues(item, "friends", [null]);

					function onItem2(item10, request){
						//DO NOT EVER ACCESS THESE VARIABLES LIKE THIS!  
						//THIS IS FOR TESTING INTERNAL STATE!
						var refMap = item10[store._reverseRefMap];
						store._dumpReferenceMap();

						console.log("MAP for Item 10 is: " + dojo.toJson(refMap));

						//Assert there is no reference to item 10 in item 11's attribute 'friends'.
						doh.assertTrue(!refMap["11"]["friends"]);
						store.setValues(item, "siblings", [0, 1, 2]);
						//Assert there are no more references to 10 in 11.  Ergo, "11"  should be a 'undefined' attribute for the map of items referencing '10'..
						doh.assertTrue(!refMap["11"]);
						deferred.callback(true);
					}
					store.fetchItemByIdentity({identity: 10, onError: onError, onItem: onItem2});

				}catch(e){
					console.debug(e);
					deferred.errback(e);
					doh.assertTrue(false);
				}
			}
			store.fetchItemByIdentity({identity: 11, onError: onError, onItem: onItem});
			return deferred;
		},
		function testReferenceIntegrity_deleteReferencedItemNonParent(){
			//	summary: 
			//		Simple test to verify the references to a non-parent item was properly deleted.
			//	description:
			//		Simple test to verify the references to a non-parent item was properly deleted.
		
			var store = new dojo.data.ItemFileWriteStore(tests.data.ItemFileWriteStore.getTestData("reference_integrity"));

			var deferred = new doh.Deferred();
			var passed = true;
			function onError(error, request){
				deferred.errback(error);
			}
			function onItem(item, request){
				try{
					console.log("Reference state for item 16 is: " + dojo.toJson(item[store._reverseRefMap]));
					store.deleteItem(item);
					function verifyRefDelete(items, request){
						var passed = true;
						for(var i = 0; i < items.length; i++){
							var curItem = items[i];
							var attributes = store.getAttributes(curItem);
							for(var j = 0; j < attributes.length; j++){
								var values = store.getValues(curItem, attributes[j]);
								var badRef = false;
								for(var k = 0; k < values.length; k++){
									var value = values[k];
									try{
										var id = store.getIdentity(value);
										if(id == 16){
											badRef = true;
											break;
										}
									}catch(e){/*Not an item, even a dead one, just eat it.*/}
								}
								if(badRef){
									deferred.errback(new Error("Found a reference remaining to a deleted item.  Failure."));
									passed = false;
									break;
								}
							}
						}
						if(passed){
							deferred.callback(true);
						}
					}
					store.fetch({onComplete: verifyRefDelete, onError: onError});
				}catch(error){
					deferred.errback(error);
				}
			}
			store.fetchItemByIdentity({identity: 16, onError: onError, onItem: onItem});
			return deferred;
		},
		function testReferenceIntegrity_addReferenceToAttribute(){
			//	summary: 
			//		Simple test to verify the reference additions can happen.
			//	description:
			//		Simple test to verify the reference additions can happen.
		
			var store = new dojo.data.ItemFileWriteStore(tests.data.ItemFileWriteStore.getTestData("reference_integrity"));

			var deferred = new doh.Deferred();
			var passed = true;
			function onError(error, request){
				deferred.errback(error);
				doh.assertTrue(false);
			}
			function onComplete(items, request){

				doh.assertTrue(items.length > 2);

				var item1 = items[0];
				var item2 = items[1];

				//DO NOT EVER ACCESS THESE VARIABLES LIKE THIS!  
				//THIS IS FOR TESTING INTERNAL STATE!
				console.log("Map state for Item 1 is: " + dojo.toJson(item1[store._reverseRefMap]));
				console.log("Map state for Item 2 is: " + dojo.toJson(item2[store._reverseRefMap]));

				store.setValue(item1, "siblings", item2);

				//Emit the current map state for inspection.
				console.log("Map state for Item 1 is: " + dojo.toJson(item1[store._reverseRefMap]));
				console.log("Map state for Item 2 is: " + dojo.toJson(item2[store._reverseRefMap]));

				doh.assertTrue(item2[store._reverseRefMap] != null);

				//Assert there is a recorded reference to item 2 in item 1's attribute 'sibling'.
				doh.assertTrue(item2[store._reverseRefMap][store.getIdentity(item1)]["siblings"]);

				deferred.callback(true);
			}
			store.fetch({onError: onError, onComplete: onComplete});
			return deferred;
		},
		function testReferenceIntegrity_newItemWithParentReference(){
			//	summary: 
			//		Simple test to verify that newItems with a parent properly record the parent's reference in the map.
			//	description:
			//		Simple test to verify that newItems with a parent properly record the parent's reference in the map.
		
			var store = new dojo.data.ItemFileWriteStore(tests.data.ItemFileWriteStore.getTestData("reference_integrity"));

			var deferred = new doh.Deferred();
			var passed = true;
			function onError(error, request){
				deferred.errback(error);
				doh.assertTrue(false);
			}
			function onItem(item, request){
				try{
					//Create a new item and set its parent to item 10's uncle attribute.
					var newItem = store.newItem({id: 17, name: "Item 17"}, {parent: item, attribute: "uncles"}); 
					
					//DO NOT EVER ACCESS THESE VARIABLES LIKE THIS!  
					//THIS IS FOR TESTING INTERNAL STATE!
					//Look up the references to 17, as item 10 has one now on attribute 'uncles'
					var refs = newItem[store._reverseRefMap];

					//Assert there is a reference from 10 to item 17, on attribute uncle
					doh.assertTrue(refs["10"]["uncles"]);

					console.log("State of map of item 17 after newItem: " + dojo.toJson(refs));
				}catch(e){
					console.debug(e);
					deferred.errback(e);
					doh.assertTrue(false);
					passed = false;
				}
				if(passed){
					deferred.callback(true);
				}
			}
			store.fetchItemByIdentity({identity: 10, onError: onError, onItem: onItem});
			return deferred;
		},
		function testReferenceIntegrity_newItemWithReferenceToExistingItem(){
			//	summary: 
			//		Simple test to verify that a new item with references to existing items properly record the references in the map.
			//	description:
			//		Simple test to verify that a new item with references to existing items properly record the references in the map.
		
			var store = new dojo.data.ItemFileWriteStore(tests.data.ItemFileWriteStore.getTestData("reference_integrity"));

			var deferred = new doh.Deferred();
			var passed = true;
			function onError(error, request){
				deferred.errback(error);
				doh.assertTrue(false);
			}
			function onItem(item, request){
				try{
					//DO NOT EVER ACCESS THESE VARIABLES LIKE THIS!  
					//THIS IS FOR TESTING INTERNAL STATE!
					console.log("State of reference map to item 10 before newItem: " + dojo.toJson(item[store._reverseRefMap]));
					
					//Create a new item and set its parent to item 10's uncle attribute.
					var newItem = store.newItem({id: 17, name: "Item 17", friends: [item]});
					
					//DO NOT EVER ACCESS THESE VARIABLES LIKE THIS!  
					//THIS IS FOR TESTING INTERNAL STATE!
					//Look up the references to 10, as item 17 has one on friends now.
					var refs = item[store._reverseRefMap];
					
					//Assert there is a reference from 15 to item 10, on attribute friends
					doh.assertTrue(refs["17"]["friends"]);

					console.log("State of reference map to item 10 after newItem: " + dojo.toJson(refs));
				}catch(e){
					console.debug(e);
					deferred.errback(e);
					doh.assertTrue(false);
					passed = false;
				}
				if(passed){
					deferred.callback(true);
				}
			}
			store.fetchItemByIdentity({identity: 10, onError: onError, onItem: onItem});
			return deferred;
		},
		function testReferenceIntegrity_disableReferenceIntegrity(){
			//	summary: 
			//		Simple test to verify reference integrity can be disabled.
			//	description:
			//		Simple test to verify reference integrity can be disabled.
		
			var params = tests.data.ItemFileWriteStore.getTestData("reference_integrity");
			params.referenceIntegrity = false;
			var store = new dojo.data.ItemFileWriteStore(params);

			var deferred = new doh.Deferred();
			function onError(error, request){
				deferred.errback(error);
				doh.assertTrue(false);
			}
			function onItem(item, request){
				//DO NOT EVER ACCESS THESE VARIABLES LIKE THIS!  
				//THIS IS FOR TESTING INTERNAL STATE!
				if(item[store._reverseRefMap] === undefined){
					deferred.callback(true);
				}else{
					deferred.errback(new Error("Disabling of reference integrity failed."));
				}
			}
			store.fetchItemByIdentity({identity: 10, onError: onError, onItem: onItem});
			return deferred;
		}
	]
);



}