Changes for page Your First Stateful Project

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• Page properties (1 modified, 0 added, 0 removed)

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Page properties

Content

...	...	@@ -91,11 +91,11 @@
91	91	<wo:if condition="$displayGroup.hasMultipleBatches">
92	92	<div>
93	93	<wo:link action="$displayGroup.displayPreviousBatch">Previous</wo:link>
94		- | Batch
	94	+ | Batch
95	95	<wo:str value="$displayGroup.currentBatchIndex" />
96		- of
	96	+ of
97	97	<wo:str value="$displayGroup.batchCount" />
98		- |
	98	+ |
99	99	<wo:link action="$displayGroup.displayNextBatch">Next</wo:link>
100	100	</div>
101	101	</wo:if>
...	...	@@ -102,9 +102,9 @@
102	102	<wo:loop list="$displayGroup.displayedObjects" item="$blogEntryItem">
103	103	<p><wo:str value="$blogEntryItem.title" /></p>
104	104	<p><wo:str value="$blogEntryItem.content" escapeHTML="false" /></p>
105		- <p>Created by
	105	+ <p>Created by
106	106	<wo:str value="$blogEntryItem.author.fullName" />
107		- on
	107	+ on
108	108	<wo:str value="$blogEntryItem.creationDate" />
109	109	</p>
110	110	<hr />
...	...	@@ -122,31 +122,60 @@
122	122
123	123	{{code}}
124	124
125		- private Author _loggedAuthor;
	125	+private Author _loggedAuthor;
126	126
127	127	public Session() {
128	128	this._loggedAuthor = null;
129	129	}
130		-
	130	+
131	131	public Author loggedAuthor() {
132	132	return this._loggedAuthor;
133	133	}
134		-
	134	+
135	135	public void setAuthor(Author loggedAuthor) {
136	136	this._loggedAuthor = loggedAuthor;
137	137	}
138	138
139		-
140	140	{{/code}}
141	141
142		-Save the file. Next: we need to add a component to present the login form to the user. Right-click on the **Components** folder in the project, and select **New** -> **WOComponent**. Change the name of the component to be **AdminMainPage** and change the superclass to **er.extensions.components.ERXComponent**.
	141	+Save the file. Next: we need to add a component to present the login form to the user. Right-click on the **Components** folder in the project, and select **New** > **WOComponent**. Change the name of the component to be **AdminMainPage** and change the superclass to **er.extensions.components.ERXComponent**.
143	143
144		-After the component have been created, open **AdminMainPage.java** and add the following code:
	143	+After the component have been created, open **AdminMainPage.java** and override the content of the class with the following code:
145	145
146	146	{{code}}
147	147
	147	+package your.app.components;
	148	+
148	148	import your.app.Session;
	150	+import your.app.model.Author;
	151	+import your.app.model.BlogEntry;
149	149
	153	+import com.webobjects.appserver.WOActionResults;
	154	+import com.webobjects.appserver.WOContext;
	155	+import com.webobjects.eoaccess.EODatabaseDataSource;
	156	+import com.webobjects.eocontrol.EOEditingContext;
	157	+
	158	+import er.extensions.batching.ERXBatchingDisplayGroup;
	159	+import er.extensions.components.ERXComponent;
	160	+import er.extensions.eof.ERXEC;
	161	+
	162	+public class AdminMainPage extends ERXComponent {
	163	+
	164	+ private ERXBatchingDisplayGroup<BlogEntry> _dg;
	165	+
	166	+ public AdminMainPage(WOContext context) {
	167	+ super(context);
	168	+ EODatabaseDataSource dataSource = new EODatabaseDataSource(editingContext(), BlogEntry.ENTITY_NAME);
	169	+ _dg = new ERXBatchingDisplayGroup<BlogEntry>();
	170	+ _dg.setNumberOfObjectsPerBatch(20);
	171	+ _dg.setDataSource(dataSource);
	172	+ _dg.setObjectArray(BlogEntry.fetchBlogEntries(editingContext(), BlogEntry.AUTHOR.eq(session().loggedAuthor()), BlogEntry.LAST_MODIFIED.descs()));
	173	+ }
	174	+
	175	+ public ERXBatchingDisplayGroup<BlogEntry> displayGroup() {
	176	+ return this._dg;
	177	+ }
	178	+
150	150	private String _emailAddress;
151	151
152	152	public String emailAddress() {
...	...	@@ -156,14 +156,109 @@
156	156	public void setEmailAddress(String emailAddress) {
157	157	this._emailAddress = emailAddress;
158	158	}
	188	+
	189	+ private BlogEntry _blogEntryItem;
159	159
	191	+ public void setBlogEntryItem(BlogEntry blogEntryItem) {
	192	+ this._blogEntryItem = blogEntryItem;
	193	+ }
	194	+
	195	+ public BlogEntry blogEntryItem() {
	196	+ return this._blogEntryItem;
	197	+ }
	198	+
160	160	@Override
161		- public WOSession session() {
162		- return ((Session)session());
	200	+ public Session session() {
	201	+ return ((Session)super.session());
163	163	}
164		-
	203	+
165	165	public boolean isLogged() {
166	166	return ((session()).loggedAuthor() == null) ? false: true;
167	167	}
	207	+
	208	+ private EOEditingContext _ec;
	209	+
	210	+ public EOEditingContext editingContext() {
	211	+ if (_ec == null) {
	212	+ _ec = ERXEC.newEditingContext();
	213	+ }
	214	+ return _ec;
	215	+ }
	216	+
	217	+ private String _errorMessage = null;
	218	+
	219	+ public String errorMessage() {
	220	+ return this._errorMessage;
	221	+ }
	222	+
	223	+ public WOActionResults login() {
	224	+ Author loggedAuthor = Author.validateLogin(editingContext(), _emailAddress);
	225	+ if (loggedAuthor != null) {
	226	+ session().setAuthor(loggedAuthor);
	227	+ } else {
	228	+ _errorMessage = "Invalid email address";
	229	+ }
	230	+ return null;
	231	+ }
	232	+}
168	168
169	169	{{/code}}
	235	+
	236	+You will notice that we are using a ERXBatchingDisplayGroup again. But this time, when we call dg.setObjectArray//, we set the array of objects so that only the blog entries created by the logged author are displayed.//
	237	+
	238	+Open **AdminMainPage.wo** and override all the content between the <body> tag to be:
	239	+
	240	+{{code}}
	241	+
	242	+
	243	+ <wo:AjaxUpdateContainer id="main">
	244	+ <wo:if condition="$isLogged">
	245	+ <wo:if condition="$displayGroup.hasMultipleBatches">
	246	+ <div>
	247	+ <wo:link action="$displayGroup.displayPreviousBatch">Previous</wo:link>
	248	+ | Batch
	249	+ <wo:str value="$displayGroup.currentBatchIndex" />
	250	+ of
	251	+ <wo:str value="$displayGroup.batchCount" />
	252	+ |
	253	+ <wo:link action="$displayGroup.displayNextBatch">Next</wo:link>
	254	+ </div>
	255	+ </wo:if>
	256	+ <wo:loop list="$displayGroup.displayedObjects" item="$blogEntryItem">
	257	+ <p><wo:str value="$blogEntryItem.title" /></p>
	258	+ <p><wo:str value="$blogEntryItem.content" escapeHTML="false" /></p>
	259	+ <p>Created by
	260	+ <wo:str value="$blogEntryItem.author.fullName" />
	261	+ on
	262	+ <wo:str value="$blogEntryItem.creationDate" />
	263	+ </p>
	264	+ <hr />
	265	+ </wo:loop>
	266	+ </wo:if>
	267	+ <wo:else>
	268	+ <wo:if condition="$errorMessage">
	269	+ <span style="text-color: red;">Error: <wo:str value="$errorMessage" /></span>
	270	+ </wo:if>
	271	+ <wo:form>
	272	+ <div>
	273	+ <label>Email address:</label>
	274	+ <wo:textField value="$emailAddress" />
	275	+ </div>
	276	+ <div><wo:AjaxSubmitButton updateContainerID="main" action="$login" value="Login" /></div>
	277	+ </wo:form>
	278	+ </wo:else>
	279	+ </wo:AjaxUpdateContainer>
	280	+
	281	+{{/code}}
	282	+
	283	+Last step: we need a link to the admin page. Open **Main.wo** and just before the </body> tag, add the following:
	284	+
	285	+{{code}}
	286	+
	287	+ <wo:link pageName="AdminMainPage">Admin</wo:link>
	288	+
	289	+{{/code}}
	290	+
	291	+Save everything, run the app and try to login. If login is not successful, you will get an error message. If login is valid, you will see the blog entries that you created.
	292	+
	293	+For the last part of this tutorial, we are going to add a link on each blog entry in the list that will bring us to a edit page where we can modify a blog entry. We are also going to add a link to create a new blog entry.