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我想在掛毯做以下工作。掛毯更新從AJAX編輯網格的DAO
我有一個Dictionary<String, Dictionary<String, Object>>其中包含我的數據。
我想完成，我有1個下拉菜單（選擇組件），其中包含外鍵字典的鍵。
當選擇發生變化時，應該使用所選子字典中的鍵和值更新網格。
例如：
Dictionary<String, Dictionary<String, Object>> dictionaries = new Hashtable<String, Dictionary<String, Object>>();
Dictionary<String, Object> dict1 = new Hashtable<String, Object>();
Dictionary<String, Object> dict2 = new Hashtable<String, Object>();
dict1.put("k1", "d1v1");
dict1.put("k2", "d1v2");
dict2.put("k1", "d2v1");
dict2.put("k2", "d2v2");
dictionaries.put("d1", dict1);
dictionaries.put("d2", dict2);
會有人會這麼好心給我一個例子或推我朝着正確的方向嗎？
編輯：
我設法拿到了第一部分工作，與網格內容進行改變，這取決於從外部字典的鍵選擇。
不過，我我在與更新網格和保存更改問題：
我用我自己的GridDataSource：
public class EntityDataSource<T> implements GridDataSource {
private Class<T> persistentClass;
protected List<T> data;
protected int count = -1;
protected int startIndex = 0;
public EntityDataSource(Class<T> persistentClass, List<T> data) {
this.persistentClass = persistentClass;
this.data = data;
}
public static final <T> EntityDataSource<T> create(
Class<T> persistentClass, List<T> data) {
return new EntityDataSource<T>(persistentClass, data);
}
public int getAvailableRows() {
return this.data.size();
}
public void prepare(int startIndex, int endIndex,
List<SortConstraint> sortConstraints) {
this.startIndex = startIndex;
this.data = this.data.subList(startIndex, endIndex + 1);
}
public Object getRowValue(int index) {
return this.data.get(index - this.startIndex);
}
@SuppressWarnings("rawtypes")
public Class getRowType() {
return this.persistentClass;
}
}
我的網格看起來是這樣的：
<t:form t:id="configSelectForm">
<t:select t:id="storageKeySelecter"
t:model="storageKeyModel"
t:value="storageKey"
zone="configZone" />
</t:form>
<t:zone t:id="configZone" id="configZone">
<t:form t:id="configReviewForm">
<table width="100%">
<t:grid t:source="configurationEntrySource"
t:add="update, delete"
t:row="configurationEntry"
t:mixins="DisableGridSorting"
t:include="configKey, configValue"
t:encoder="configurationEntryEncoder">
<p:configValueCell>
<input t:id="value" t:type="TextField" t:value="configurationEntry.configValue"
t:validate="required" t:context="configurationEntry.configValue" />
</p:configValueCell>
<p:updateCell>
<t:actionlink t:id="update" zone="configZone" context="[configurationEntry.configKey, configurationEntry.configValue]">Update</t:actionlink>
</p:updateCell>
<p:deleteCell>
<t:actionlink t:id="delete" zone="configZone" context="configurationEntry.configKey">Delete</t:actionlink>
</p:deleteCell>
</t:grid>
</table>
<br></br>
<!-- <input type="submit" value="Update" class="button" /> -->
</t:form>
</t:zone>
我設法做出了一個刪除鏈接的工作，但是，我似乎無法更新任意鍵的值。
當我點擊更新的鏈接，從文本字段的值不是正在傳遞的一個：
public Object onActionFromUpdate(String configKey, String configValue) {
// my stuff here
return request.isXHR() ? configZone.getBody() : null;
}
的configValue是入門當前存在和價值不是我試圖改變它。
有沒有辦法獲得該值？我的網格有一個任意數量的行。
EDIT2：即使更多信息提供
這是我的TML：
<t:form t:id="configSelectForm">
<t:select t:id="storageKeySelecter"
t:model="storageKeyModel"
t:value="storageKey"
zone="configZone" />
</t:form>
<br/>
<t:zone t:id="configZone" id="configZone" elementName="div">
<form t:type="form" t:id="configReviewForm" id="configReviewForm" t:zone="configZone" zone="configZone">
<table width="100%">
<t:grid t:source="configurationEntries"
t:add="update, delete"
t:row="configurationEntry"
t:mixins="DisableGridSorting"
t:include="configKey, configValue"
t:encoder="configurationEntryEncoder" >
<p:configValueCell>
<input t:id="configValueTextField" t:type="TextField" t:value="configurationEntry.configValue"
t:validate="required" />
</p:configValueCell>
<p:updateCell>
<t:actionlink id="update" t:id="update" zone="configZone" t:context="[configurationEntry.configKey, configurationEntry.configValue]">Update</t:actionlink>
</p:updateCell>
<p:deleteCell>
<t:actionlink id="delete" t:id="delete" zone="configZone" t:context="configurationEntry.configKey">Delete</t:actionlink>
</p:deleteCell>
</t:grid>
</table>
<br/>
<input type="submit" value="Update" class="button" zone="configZone"/>
</form>
</t:zone>
<br/>
<br/>
<t:form t:id="addNewEntryForm">
<table width="100%">
<tr>
<td>
<input t:id="newEntryKey" t:type="textfield" t:value="newEntry.configKey"
t:validate="required" t:context="newEntry.configKey" />
</td>
<td>
<input t:id="newEntryValue" t:type="textfield" t:value="newEntry.configValue"
t:validate="required" t:context="newEntry.configValue" />
</td>
<td>
<input type="submit" value="Add New Entry" zone="configZone"/>
</td>
</tr>
</table>
</t:form>
這是我的JAVA：
public class PropertyConfiguration {
@Inject
private BeanModelSource beanModelSource;
@Component
private Form configReviewForm;
@Property
private List<ConfigurationEntry> configurationEntries;
private List<ConfigurationEntry> persistentEntries;
@Property
private ConfigurationEntry configurationEntry = new ConfigurationEntry("", "");
@Property
private ConfigurationEntryEncoder configurationEntryEncoder;
@InjectComponent
private Zone configZone;
@InjectComponent
private TextField configValueTextField;
@Inject
private ConfigurationPersitanceDAO dao;
private GridDataSource dataSource;
@Inject
private Messages messages;
@Property
private ConfigurationEntry newEntry;
@Inject
private Request request;
@Property
@Validate("required")
@Persist(PersistenceConstants.SESSION)
private String storageKey;
private StringSelectModel storageKeysSelectModel;
public ValueEncoder<ConfigurationEntry> getConfigurationEntryEncoder() {
initConfigurationEntityEncoder();
return this.configurationEntryEncoder;
}
public BeanModel<ConfigurationEntry> getModel() {
return beanModelSource.createDisplayModel(ConfigurationEntry.class, messages);
}
public SelectModel getStorageKeyModel() {
if (storageKeysSelectModel == null) {
storageKeysSelectModel = new StringSelectModel(this.dao.getStorageKeys());
}
return storageKeysSelectModel;
}
private void initConfigurationEntityEncoder() {
if (this.configurationEntryEncoder == null) {
this.configurationEntryEncoder = new ConfigurationEntryEncoder(dao, storageKey);
}
}
private void initZoneData() {
if (this.storageKey == null) {
this.storageKey = this.dao.getStorageKeys().get(0);
}
initConfigurationEntityEncoder();
}
public Object onActionFromDelete(String configKey) {
System.out.println("Deleting from: " + storageKey + " entry: " + configKey);
this.dao.deleteConfigurationEntry(storageKey, configKey);
return request.isXHR() ? configZone.getBody() : null;
}
public Object onActionFromUpdate(String configKey, String configValue) {
this.dao.updateConfigurationEntry(storageKey, configKey, configValue);
return request.isXHR() ? configZone.getBody() : null;
}
void onActivate(String storageKey) {
initZoneData();
this.newEntry = new ConfigurationEntry("", "");
}
String onPassivate() {
this.newEntry = new ConfigurationEntry("", "");
return this.storageKey;
}
Object onRefresh() {
return request.isXHR() ? configZone.getBody() : null;
}
Object onSuccessFromAddNewEntryForm() {
String configKey = this.newEntry.getConfigKey();
String configValue = this.newEntry.getConfigValue();
this.dao.addConfigurationEntry(storageKey, configKey, configValue);
return request.isXHR() ? configZone.getBody() : null;
}
void onValidateFromAddNewEntryForm() {
return;
}
Object onValueChangedFromStorageKeySelecter(String storageKey) {
this.storageKey = storageKey;
initConfigurationEntityEncoder();
this.configurationEntries = wrap(this.dao.getConfiguration(storageKey));
return configZone.getBody();
}
private void updateChangedConfigurations(List<ConfigurationEntry> changedEntries) {
for (ConfigurationEntry changedEntry : changedEntries) {
String configKey = changedEntry.getConfigKey();
String configValue = changedEntry.getConfigValue();
System.out.println("Updated: [" + storageKey + ":" + configKey + ":" + configValue + "]");
this.dao.updateConfigurationEntry(storageKey, configKey, configValue);
}
}
void onValidateFromConfigReviewForm() {
this.persistentEntries = wrap(this.dao.getConfiguration(storageKey));
List<ConfigurationEntry> tmpList = new ArrayList<ConfigurationEntry>();
for (ConfigurationEntry newEntry : this.configurationEntries) {
for (ConfigurationEntry oldEntry : this.persistentEntries) {
System.out.println("NewEntry: " + newEntry.toString() + " vs. OldEntry: " + oldEntry.toString());
if (oldEntry.getConfigKey().equals(newEntry.getConfigKey())) {
if (!oldEntry.getConfigValue().equals(newEntry.getConfigValue())) {
newEntry.setConfigValue(newEntry.getConfigValue().trim());
tmpList.add(newEntry);
}
}
}
}
this.persistentEntries = tmpList;
}
Object onSuccessFromConfigReviewForm() {
updateChangedConfigurations(this.persistentEntries);
return request.isXHR() ? configZone.getBody() : null;
}
/**
* Wraps dictionary entries in instances of ConfigurationEntry
*/
private List<ConfigurationEntry> wrap(
Dictionary<String, Object> rawConfiguration) {
Set<String> keySet = new TreeSet<String>();
List<ConfigurationEntry> wrappedEntries = new ArrayList<ConfigurationEntry>();
Enumeration<String> keys = rawConfiguration.keys();
while (keys.hasMoreElements()) {
String key = keys.nextElement();
keySet.add(key);
}
for (String key : keySet) {
String value = (String) rawConfiguration.get(key);
ConfigurationEntry entry = new ConfigurationEntry(key, value);
wrappedEntries.add(entry);
}
return wrappedEntries;
}
}
出於某種原因， WH單擊「更新」操作鏈接時，傳遞給public Object onActionFromUpdate(String configKey, String configValue)的值不是我剛剛寫入指定文本字段的值，而是頁面呈現時從我的數據庫中提取的值。
例如，如果我有這些對最初：
key1 => value1
key2 => value2
key3 => value3
，我想爲key2爲「newValue2」的傳遞給該方法參數變化值分別是「KEY2」和「值2」，而不是「 key2「和」newValue2「。
同樣的問題是大規模更新不起作用的原因。 configurationEntries中的所有值都是來自數據庫的shapshot值，而不是當前寫入網格中的值。
所以，我的問題是我如何使用AJAX更新我的可編輯網格中的數據庫作爲具體示例。我已經嘗試了很多東西和其他互聯網上的建議，但他們似乎沒有工作，我不知道爲什麼。
不知道爲什麼你加入懸賞這個自@nathanq已經提供了一個鏈接到正在運行的演示用代碼完成jumpstart？ –