XML Tags using Builder - ruby-on-rails

I am currently building an XML export for a Real Estate app. using the Builder gem in Rails. And I am looking for a way to do the following:
<commercialRent>
"commercialRent figure"
<range>
...
</range>
</commercialRent>
I can't seem to find a way to implement the "Text Goes Here" part
My code:
b.commercialRent(period: "annual", plusOutgoings: self.plus_outgoings) {
self.rent_price;
b.range {
b.min(self.rent_psm_pa_min);
b.max(self.rent_psm_pa_max)
};
};
Returns:
<commercialRent period="annual" plusOutgoings="no">
<rentPerSquareMeter>
<range>
<min>1000</min>
<max>10000</max>
</range>
</rentPerSquareMeter>
</commercialRent>
Everything prints fine, except the self.rent_price is missing.
I can't figure it out.

You use the text! method to produce a text node:
- (Object) text!(text)
Append text to the output target. Escape any markup. May be used within the markup brackets as:
builder.p { |b| b.br; b.text! "HI" } #=> <p><br/>HI</p>
So something like this should do the trick:
b.commercialRent(period: "annual", plusOutgoings: self.plus_outgoings) do
b.text! self.rent_price
#...
end

Related

How to show String new lines on gsp grails file?

I've stored a string in the database. When I save and retrieve the string and the result I'm getting is as following:
This is my new object
Testing multiple lines
-- Test 1
-- Test 2
-- Test 3
That is what I get from a println command when I call the save and index methods.
But when I show it on screen. It's being shown like:
This is my object Testing multiple lines -- Test 1 -- Test 2 -- Test 3
Already tried to show it like the following:
${adviceInstance.advice?.encodeAsHTML()}
But still the same thing.
Do I need to replace \n to or something like that? Is there any easier way to show it properly?
Common problems have a variety of solutions
1> could be you that you replace \n with <br>
so either in your controller/service or if you like in gsp:
${adviceInstance.advice?.replace('\n','<br>')}
2> display the content in a read-only textarea
<g:textArea name="something" readonly="true">
${adviceInstance.advice}
</g:textArea>
3> Use the <pre> tag
<pre>
${adviceInstance.advice}
</pre>
4> Use css white-space http://www.w3schools.com/cssref/pr_text_white-space.asp:
<div class="space">
</div>
//css code:
.space {
white-space:pre
}
Also make a note if you have a strict configuration for the storage of such fields that when you submit it via a form, there are additional elements I didn't delve into what it actually was, it may have actually be the return carriages or \r, anyhow explained in comments below. About the good rule to set a setter that trims the element each time it is received. i.e.:
Class Advice {
String advice
static constraints = {
advice(nullable:false, minSize:1, maxSize:255)
}
/*
* In this scenario with a a maxSize value, ensure you
* set your own setter to trim any hidden \r
* that may be posted back as part of the form request
* by end user. Trust me I got to know the hard way.
*/
void setAdvice(String adv) {
advice=adv.trim()
}
}
${raw(adviceInstance.advice?.encodeAsHTML().replace("\n", "<br>"))}
This is how i solve the problem.
Firstly make sure the string contains \n to denote line break.
For example :
String test = "This is first line. \n This is second line";
Then in gsp page use:
${raw(test?.replace("\n", "<br>"))}
The output will be as:
This is first line.
This is second line.

Accessing Ruby Hash value using a string

I have a ruby array like below
tomcats = [
'sandbox',
'sandbox_acserver',
'sandbox_vgw'
]
I need to pass the string as a hash index like below
tomcats.each do |tomcat_name|
obi_tomcat '#{tomcat_name}' do
Chef::Log::info("Creating tomcat instance - #{tomcat_name}")
Chef::Log::info("#{node['obi']['tomcat']['sandbox'][:name]}") // works
Chef::Log::info("#{node['obi']['tomcat']['#{tomcat_name}'][:name]}") // doesn't work
end
end
The last log throws an error since the access with #{tomcat_name} is nil. I'm new to ruby. How do I access with key as the tomcat_name ?
In normal code, you'd write:
node['obi']['tomcat'][tomcat_name][:name]
In a string interpolation (useless here, because it's the only thing in the string in this case), it is completely the same:
"#{node['obi']['tomcat'][tomcat_name][:name]}"
#{} only works in double quote, as "#{tomcat_name}".
But you don't need the syntax here, just use [tomcat_name] directly.
When I saw this question, I'm thinking whether ruby placeholder could be put inside other placeholder in string interpolation. And I found that ruby actually support it, and most interesting thing is that you don't need to escape the " inside the string.
Although it is not very useful in this case, it still works if you write as below:
Chef::Log::info("#{node['obi']['tomcat']["#{tomcat_name}"][:name]}")
Below is an simple example of placeholder inside other placeholder:
tomcats = [
'sandbox',
'sandbox_acserver',
'sandbox_vgw'
]
node = {
'sandbox_name' => "sandbox name",
'sandbox_acserver_name' => "sandbox_acserver name",
'sandbox_vgw_name' => "sandbox_vgw name",
}
tomcats.each do | tomcat |
puts "This is tomcat : #{node["#{tomcat}_name"]}"
end

Generate a link_to on the fly if a URL is found inside the contents of a db text field?

I have an automated report tool (corp intranet) where the admins have a few text area boxes to enter some text for different parts of the email body.
What I'd like to do is parse the contents of the text area and wrap any hyperlinks found with link tags (so when the report goes out there are links instead of text urls).
Is ther a simple way to do something like this without figuring out a way of parsing the text to add link tags around a found (['http:','https:','ftp:] TO the first SPACE after)?
Thank You!
Ruby 1.87, Rails 2.3.5
Make a helper :
def make_urls(text)
urls = %r{(?:https?|ftp|mailto)://\S+}i
html_text = text.gsub urls, '\0'
html_text
end
on the view just call this function , you will get the expected output.
like :
irb(main):001:0> string = 'here is a link: http://google.com'
=> "here is a link: http://google.com"
irb(main):002:0> urls = %r{(?:https?|ftp|mailto)://\S+}i
=> /(?:https?|ftp|mailto):\/\/\S+/i
irb(main):003:0> html = string.gsub urls, '\0'
=> "here is a link: http://google.com"
There are many ways to accomplish your goal. One way would be to use Regex. If you have never heard of regex, this wikipedia entry should bring you up to speed.
For example:
content_string = "Blah ablal blabla lbal blah blaha http://www.google.com/ adsf dasd dadf dfasdf dadf sdfasdf dadf dfaksjdf kjdfasdf http://www.apple.com/ blah blah blah."
content_string.split(/\s+/).find_all { |u| u =~ /^https?:/ }
Which will return: ["http://www.google.com/", "http://www.apple.com/"]
Now, for the second half of the problem, you will use the array returned above to subsititue the text links for hyperlinks.
links = ["http://www.google.com/", "http://www.apple.com/"]
links.each do |l|
content_string.gsub!(l, "<a href='#{l}'>#{l}</a>")
end
content_string will now be updated to contain HTML hyperlinks for all http/https URLs.
As I mentioned earlier, there are numerous ways to tackle this problem - to find the URLs you could also do something like:
require 'uri'
URI.extract(content_string, ['http', 'https'])
I hope this helps you.

grails/groovy braces syntax question

I'm working with an example that I can't understand what the braces do -- the ones around the "Logout" in the second "out" statement below. I guess the string is passed as a closure but I'm not getting the syntax beyond that. Can you please clarify? Note the output of the code looks like the following:
John Doe [Logout]
class LoginTagLib {
def loginControl = {
if(request.getSession(false) && session.user){
out << "Hello ${session.user.login} "
out << """[${link(action:"logout",
controller:"user"){"Logout"}}]"""
} else {
out << """[${link(action:"login",
controller:"user"){"Login"}}]"""
}
}
}
Thanks Much
The link tag takes attributes and a body, and as a regular GSP tag it's called like this:
<g:link action="logout" controller="user">Logout</g:link>
To invoke it as a method like you're doing, you need a way to pass the text ('Logout') to render in the link. If you look at the source of the tag (click "Show Source" at the bottom of http://grails.org/doc/latest/ref/Tags/link.html) you'll see that the 2nd argument is body, and it's a Closure (although that's not clear from the code, but that's always the case for 2-parameter tags). {"Logout"} is a Closure that returns "Logout" since it's the last expression, so it's used as the body.
Actually the output should be
Hello John Doe [Logout]
Essentially, if there is a session and a user write Hello user and create a link pointing to a logout action with the label Logout.
{ "Logout" } is a closure equivalent to { return "Logout"; } as the last statement is used for a return value if none is explicitly stated.
I am not able to get the output like below
Hello John Doe [Logout]
Here is the output I am getting
Hello jdoe [Logout

How to parse a remote website and create a link on every single word for a dictionary tooltip?

I want to parse a random website, modify the content so that every word is a link (for a dictionary tooltip) and then display the website in an iframe.
I'm not looking for a complete solution, but for a hint or a possible strategy. The linking is my problem, parsing the website and displaying it in an iframe is quite simple. So basically I have a String with all the html content. I'm not even sure if it's better to do it serverside or after the page is loaded with JS.
I'm working with Ruby on Rails, jQuery, jRails.
Note: The content of the href tag depends on the word.
Clarification:
I tried a regexp and it already kind of works:
#site.gsub!(/[A-Za-z]+(?:['-][A-Za-z]+)?|\\d+(?:[,.]\\d+)?/) {|word| '' + word + ''}
But the problem is to only replace words in the text and leave the HTML as it is. So I guess it is a regex problem...
Thanks for any ideas.
I don't think a regexp is going to work for this - or, at least, it will always be brittle. A better way is to parse the page using Hpricot or Nokogiri, then go through it and modify the nodes that are plain text.
It sounds like you have it mostly planned out already.
Split the content into words and then for each word, create a link, such as whatever
EDIT (based on your comment):
Ahh ... I recommend you search around for screen scraping techniques. Most of them should start with removing anything between < and > characters, and replacing <br> and <p> with newlines.
I would use Nokogiri to remove the HTML structure before you use the regex.
no_html = Nokogiri::HTML(html_as_string).text
Simple. Hash the HTML, run your regex, then unhash the HTML.
<?php
class ht
{
static $hashes = array();
# hashes everything that matches $pattern and saves matches for later unhashing
function hash($text, $pattern) {
return preg_replace_callback($pattern, array(self,'push'), $text);
}
# hashes all html tags and saves them
function hash_html($html) {
return self::hash($html, '`<[^>]+>`');
}
# hashes and saves $value, returns key
function push($value) {
if(is_array($value)) $value = $value[0];
static $i = 0;
$key = "\x05".++$i."\x06";
self::$hashes[$key] = $value;
return $key;
}
# unhashes all saved values found in $text
function unhash($text) {
return str_replace(array_keys(self::$hashes), self::$hashes, $text);
}
function get($key) {
return self::$hashes[$key];
}
function clear() {
self::$hashes = array();
}
}
?>
Example usage:
ht::hash_html($your_html);
// your word->href converter here
ht::unhash($your_formatted_html);
Oh... right, I wrote this in PHP. Guess you'll have to convert it to ruby or js, but the idea is the same.

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