I have an issue with my portlet and I don't know exactly how to solve it.
My portlet adds or retrieves info from liferay's DB by inserting a name in 2 text fields.
After pressing the submit button, I see the response from the server, a JSON response like this:
{"id":301,"name":"Pepo"}
If a user correctly inserted or if the search throws a good result. I have to go back in the browser to see the portal again.
How can I use AJAX to pass the following URL dynamically from the portlet to the server without refreshing the page afterwards?
http://localhost:8080/c/portal/json_service?serviceClassName=com.liferay.test.service.TrabajadorServiceUtil&serviceMethodName=findByName&servletContextName=TrabajadorPlugin-portlet&serviceParameters=[param1]¶m1=NameInsertedByUser
Now I'm using the <form> tag like this:
<%
//Shows "New Employee" in the text field when portlet is rendered, or gets the user input and pass it as a param to the URL
PortletPreferences prefs = renderRequest.getPreferences();
String employee = (String)prefs.getValue("name", "New Employee");
%>
<form id="postForm" method="post" action="http://localhost:8080/c/portal/json_service">
<input name="serviceClassName" type="hidden" value="com.liferay.test.service.TrabajadorServiceUtil" />
<input name="serviceMethodName" type="hidden" value="create" />
<input name="servletContextName" type="hidden" value="TrabajadorPlugin-portlet" />
<input name="serviceParameters" type="hidden" value="[param]" />
<input name="param" type="text" value="<%=employee%>" />
<input type="submit" value="Submit"/>
</form>
I understand how AJAX works, but I need some help to create my function in order to achieve the URL to be correctly sent to the server for both GET and POST requests. This is my first try with AJAX.
Thank you very much, hope somebody understands my problem and could help me.
First of all, I see no point at all to use JSON services here. Just write ordinary portlet with MVC Controller, and in controller write action handling for corresponding actions (storing data, searching etc).
In controller you can directly call static methods like create or findByName from java class com.liferay.test.service.TrabajadorServiceUtil (or TrabajadorLocalServiceUtil) - that's how people usually do it.
If for some reason you really must use JSON, you should of course do these actions with AJAX calls - and render results using JavaScript.
Updating after question update:
The easiest and most correct way to send AJAX requests in Liferay would be to use AlloyUI JS framework that's a part of Liferay. You can read more on how to send AJAX requests with it here: http://www.liferay.com/web/nathan.cavanaugh/blog/-/blogs/4733559
In order to accomplish your goal I'd suggest implementing processAction(ActionRequest actRequest, ActionResponse actResponse) method in your controller/portlet.
In order to actually send data to it you'll have to have actionURL, which you can create using for example portlet:actionURL tag:
<portlet:actionURL /> or with Java code PortletURL actionUrl = portletResponse.createActionURL();
Then just submit your form using POST to this URL, and in actionRequest you'll have your parameters.
Related
I need to create a form that by clicking on it will redirect to another website with special 'inputs' tags values.
something like:
<form action="http://example.com" method="post">
<input type="hidden" name="val1" value="something">
<input type="hidden" name="val2" value="else">
<input type="submit" name="submit" value="Go">
</form>
The custom HTML feature that I find will put it inside an iframe, and it looks bad. Is there a way to do it that will look 'normal'?
If you utilize Wix Code you can develop that inside your Wix page without the need of any html forms.
Simple solution:
- Add the form input elements you need on your page
- Add a button to click on
- Add av event handler to the button and grab the values from the input fields
- Send that data to any site or redirect the user to the site you want using wixLocation.to("url") with the query parameters you might need from the form.
I am facing an issue that is really hard to debug. I have a JSP page that has some form elements on it that submit to a Struts2 action. I also have a XML form validation file to perform some validation on the submitted fields. The file has the naming convention 'actionName-validation.xml'
This works fine, but when I add a drop down box, outside of the form, the validation now fails. Instead it redirects to a blank page and my breakpoint in my action class is not hit.
Is there a way to turn on some kind of debugging or logging for the validation? Why would adding a tag outside of a form cause this to happen?
Here is the code on the JSP page:
<s:select id="dataSource" name="selectedDataSource" theme="simple" listValue="top"
headerKey="" headerValue="Choose Data" list="dataSources" size="1" />
<div id="forms">
<s:form method="post" action="MyAction" theme="simple">
<p>
<label class="input" for="name"
<span style="color:red;">*</span>
<span>Name</span><br>
<s:textfield theme="simple" name="name" maxlength="11" size="11" />
<br>
<s:fielderror theme="plain"><s:param value="'name'" /</s:fielderror></label>
</p>
<s:submit value="Create New" theme="simple" cssStyle="display: block; clear: left;"/>
</s:form>
</div>
If I remove the <s:select> tag, it works.
Any help would be greatly appreciated it.
EDIT2: I found the problem. I needed a get method for the list that is used to populate the select drop down inside the action that the form submits to.
I had one for the action that initially is called for the page, but when the validation fails and it re-loads that page from the form action class, it tries to re-populate the select drop down and needs a getter there. I feel silly for not finding that sooner. Would be nice if there were some type of logging or messaging of these types of issues.
thanks.
The error you are encountering is not a validation error (handled by the Validation Interceptor), but an error occurred when setting the parameters (raised by the Parameters Interceptor) and for which the Conversion Error Interceptor added a fieldError, which you are not seeing because
your INPUT result lands on a blank page and
you are using theme="simple" on the textfield, which forces you to add <s:fielderror fieldName="dataSource" /> to show it (or <s:fielderror /> to show them all).
Read how the INPUT result works, set your page as the INPUT page, print the errors, then you will discover the problem, that is most likely related to the fact that you've not specified a listKey attribute in your select, that is sending the description instead of the code of the datasource to selectedDataSource, which is probably an Integer.
I found the problem. I needed a get method for the list that is used to populate the select drop down inside the action that the form submits to.
I had one for the action that initially is called for the page, but when the validation fails and it re-loads that page from the form action class, it tries to re-populate the select drop down and needs a getter there. I feel silly for not finding that sooner. Would be nice if there were some type of logging or messaging of these types of issues.
I am very new to cs cart. I have read their documentation about calling Ajax with form micrformats. I am able to create a Ajax request. But I would like to call a controller inside my add-on controllers/frondend/ directory names as mycheckout.php. I am using the a hidden file dispatch with the valu mycheckout.mymode. Can any one help me. I actually want to perform some action in my controller. But their documentation did not help me. Thanks in advance.
You can do something like this (use extra "cm-ajax-force" or "cm-ajax-full-render" classes if needed):
<form class="cm-ajax" name="your_name" action="{""|fn_url}" method="post">
<input type="hidden" name="result_ids" value="div_id_to_be_updated" />
{include file="buttons/go.tpl" but_name="mycheckout.mymode" alt=__("Ajax button")}
</form>
Or you can use any button you want (even <input type="submit" name="mychechkout.mymode" value="Ajax!">)
Note that the Ajax request can be also done via simple link:
<a class="cm-ajax cm-post" href="{"mycheckout.mymode?param1=value1¶m2=value2"|fn_url}" data-ca-target-id="div_id_to_be_updated">Ajax!</a>
I have view which takes care of all the Ajax submits from the client side. And to differentiate them by I uses different submit button names such as this one
<input type="submit" value="Send" name="send_message">
Suggested from this question.
The only problem is that from the view side it doesn't seems to carry the name to the server side so I cannot use the following if-statement
if 'send_message' in request.POST:
It works if I send it normally with page fresh. But I want to use it with Ajax.
I came up with a hack that you can add this name with jQuery. Simply by after serializing() your data you then concatenate the name attribute by data += "&send_message"
Then the if statement will work. But it doesn't seems so clean. So I wonder if there's a better way to handle this? Or should I make different views to handle the different Ajax calls I have?
You really should post each form to a different URL.
If not, you could add a hidden input with the name of the form as the value.
<input name="form_name" type="hidden" value="form_1" />
views.py:
form_name = request.POST['form_name']
<FORM NAME="form1" METHOD="POST" action="some.jsp">
<INPUT TYPE="text" NAME="first" VALUE="First">
<INPUT TYPE="text" NAME="second" VALUE="Second">
</FORM>
When the form is submitted in the background a POST method is sent to that jsp page with the parameters.
What I am trying to do is that I have an ajax call to a local mediator jsp page which should then take those parameters and post to a page on another domain (this is for me to circumvent the cross-domain problem with ajax calls in IE8).
How would I do an explicit post? Something that takes a URL and the parameters?
If all you are having issue with is posting the form, it is as simple as
document.forms['form1'].submit()
EDIT: In that case, see Using java.net.URLConnection to fire and handle HTTP requests for how to make a POST or GET request. I would recommend using request.getParameterMap() and iterating over that, dropping those parameters into the new outbound request.
http://tomcat.apache.org/tomcat-5.5-doc/catalina/docs/api/org/apache/catalina/connector/Request.html