I have a dynamic list < li >
<li>The user name "marcus001" is already taken.</li>
I need to replace this whole line with:
<li><p>Thank you for your registration</p></li>
I'm not sure how to proceed, I have tried to replace this whole DOM, but because the username "marcus001" is dynamic, it always fails to target.
Notes:
This is generated by a system so there are no id's associated.
Try using id attribute to target the <li>
<li id="message">The user name "marcus001" is already taken.</li>
Change it using javascript
document.getElementById("message").innerHTML="<p>Thank you for your registration</p>";
Related
<div id="content-body-14269002-17290547">
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
<p>...</p>
</div>
I Need To Select Everything in id = "content-body*"
content-body changes on every Page, May Be Need to Use Wildcards ?
Probably xpath search for divs where the id contains specific text Duplicate
Anyways,
For IDs
//div[contains(#id,"content-body")]//p #to Select all Paragraphs
//div[contains(#id,"content-body")]//p//text() # To Select all text in Paragraphs
For Classes
//*[contains(#class,"content-body")//p
//div[contains(#class,"content-body")]//p//text()
For Class in Class
//*[contains(#class,"content-body") and contains(#class,"another-sub-content-body")]//p//text()
Hope it Helps !!!
//div[contains(#id, "content-body")]
This means content-body in content-body-14269002-17290547
Normally, this will works.
Better:
//div[starts-with(#id, "content-body")]
This means the id attribute's value is started with content-body
I am new to rails and haven't really done to much with data outside of the model.
I have a form that references a table controller for files. I want to add an dropdown that will display a list of projects from a project table for the user to assign a the file to a project if they want too. Assigning a project is not a requirement. The file can be unassigned to a project. I do have a project_id column in the file table for those projects assigned but it is allowed to be null and I did not build a relationship because I need to have cases where there are none.
Can someone please tell me how to do this?
When they evaluate the file, the screen posts back with a save or update button depending if it has already been saved in the database.
At the same time as the save and update pop up on the right I want to display a list box of the projects with an assign project button. If new just a list, if update either just a list because not assigned or display the selected value in the list if already assigned, while allowing them to change it from the list if desired.
In the file controller method that posts back to the UI I have this code:
#file_alias_filedata = FileAliasFiledata.all
#projects = Project.all
for update
#projects = Project.find(params[:id])
In the form I have this code:
<p> <label> Select Project to Assign:</label> <br />
<%= select_tag 'projects', (#projects.present? ? options_for_select(#projects, #selected_project) : []) %> </p>
The form runs but I get this in the dropdown box:
#<Project:0x))7ff531ab4518>
Can someone please help me figure out how to accomplish my task and why I see the strange box value?
What am I doing wrong?
Thank you for your help!
Assigning a project is not a requirement. The file can be unassigned
to a project. I do have a project_id column in the file table for
those projects assigned but it is allowed to be null
From the docs:
belongs_to(name, scope = nil, options = {}) public
Specifies a
one-to-one association with another class. This method should only be
used if this class contains the foreign key. If the other class
contains the foreign key, then you should use has_one instead. See
also ActiveRecord::Associations::ClassMethods’s overview on when to
use has_one and when to use belongs_to.
Methods will be added for retrieval and query for a single associated
object, for which this object holds an id:
association(force_reload = false)
Returns the associated object. nil is returned if none is found.
Likewise,
has_many(name, scope = nil, options = {}, &extension) public
Specifies
a one-to-many association. The following methods for retrieval and
query of collections of associated objects will be added:
collection(force_reload = false) Returns an array of all the
associated objects. An empty array is returned if none are found.
But belongs_to() and has_many() are supposed to make things more convenient for you. You certainly do not have to use them.
Next,
and why I see the strange box value? What am I doing wrong?
You see the strange value for the same reason the following two loops display different things:
class Dog
attr_reader :name
def initialize(name)
#name = name
end
end
#dogs = [
Dog.new("Sam"),
Dog.new("Betty"),
Dog.new("Pete"),
]
#dogs.each {|dog| puts dog}
#dog_names = #dogs.map {|dog| dog.name }
#dog_names.each {|dog_name| puts dog_name}
--output:--
#<Dog:0x0000010099a308>
#<Dog:0x0000010099a2b8>
#<Dog:0x0000010099a268>
Sam
Betty
Pete
You will see the same result if you do something like the following in a view:
<div>
<%= select_tag "dog", options_for_select(#dogs) %>
</div>
<div>
<%= select_tag "dog_name", options_for_select(#dog_names) %>
</div>
If you read the docs here:
http://apidock.com/rails/ActionView/Helpers/FormOptionsHelper/options_for_select
...you will see several examples, which should make it clear that options_for_select() takes an argument that is:
An array of Strings.
A Hash where both the keys and values are Strings.
An enumerable that iterates over some Strings.
etc.
Do you see a pattern? It's Strings! options_for_select() needs an argument that consists of Strings. If the argument is not a collection of Strings, e.g. an array of project objects, then options_for_select() tries to convert the objects to strings by calling to_s() on the objects. And the default to_s() method is Object#to_s() which is inherited by all objects and produces a string containing the class name and the object_id.
I am also new to rails, but I think you can try using the options_from_collection_for_select method.
<%= select_tag :search_state, options_from_collection_for_select(State.find(:all, :select => :name), :name, :name) %>
Hope this help. Cause it certainly helped me.
Why is the following code NOT working without id or name attribute specified for the anchor element?
<html>
<body>
First link
<p>innerHTML of the first anchor:
<script>document.write(document.anchors[0].innerHTML);</script>
</p>
</body>
</html>
But if I add an id (or name) attribute, like that:
<a id="first" href="#">First link</a>
It starts to work.
Why is id or name attribute so important? I don't refer to it in my javascript code. I don't use "getElementById" or anything, but it still wants an id to be specified.
P.S. I tested only in IE7 (not the best browser, but I don't have access to anything better at the moment, and it can't stop me from learning :)
UPDATE:
Thanks to Raynos who gave me an idea of HTMLCollection in his answer, I've gotten a deeper understanding of what's going on here, by searching the web.
When we use document.anchors collection, we're actually referring to a collection of a elements with the name attribute that makes an a element behave as an anchor, and not (only) as a link.
We don't have to specify the name attribute if we want to refer to a elements as links. In this case we just need to use a different instance of HTMLCollection object which is document.links.
So the original code will work without name attribute if we modify it to:
document.write(document.links[0].innerHTML);
What a nice feeling of enlightenment! :)
WHATWG says:
The anchors attribute must return an HTMLCollection rooted at the Document node, whose filter matches only a elements with name attributes.
the document.anchors collection needs <a> elements with a name attribute.
IE is known to have bugs where it treats id's and name's as the "same" thing. So that would probably explain why it works for <a> elements with an id attribute.
As an aside, document.write and .innerHTML are evil.
Why don't you use this:
document.getElementsByTagName('a')[0].innerHTML
So here's the problem I am writing a program that is going to look through the folder on the localhost before it is rendered. I want to be able to get the value of the ID of a web element and store that in a list object.
For example I have a page:
<html>
<body>
<CustomControl:MyPhoneValidationControl ID="PhoneValidator" validationgroup="PageValidation" />
<CustomControl:MyEmailValidationControl ID="EmailValidator" validationgroup="PageValidation" />
</body>
</html>
The program will go to C:\WebFolder\Page.aspx and then will read the file and find every CustomControl on the page and then grab the Control Type (MyPhoneValidationControl OR MyEmailValidationControl) and then assign the value of the ID (PhoneValidator, EmailValidator) as a property of the Control object.
I am using C#.NET 4.0. Getting the ID of the element is easy after the page is rendered but it doesn't show that it is a custom control. To see the custom control you need to look at the .aspx file without it being rendered by a web server (IIS, etc.)
I resolved myself this by stuffing the page data into a string and then using
string page = new StreamReader(page).ReadToEnd();
List<string> control = new List(string)();
MatchCollection matchControl = Regex.Matches(text, "expression");
foreach (Match match in matchControl)
{
control.Add(match.Value)
}
This catches the control to a list and then I can parse the string list to get the type and ID using Regex in the properties after passing the whole control List to the controls constructor.
In jquery is it possible to access a select element by simply using the div or span id plus the "select" selector? I ask because i have a series of auto-generated forms meaning I can't assign an id to the form elements plus the names are weird like "w24", I'd like to access a form element specifically a select using the surrounding span id and "select" selector example:
$("#hiv_care select").attr("disabled",true);
I've tried this but it doesn't work, forcing me to explicitly use the dropdown name.
Seems I was using the wrong div id. SLaks thanks for the link to jsfiddle.net it exposed my ways and is really helping me with testing out my jquery code.