I have a string. That string is a html code and it serves as a teaser for the blog posts I am creating. The whole html code (teaser) is stored in a field in the database.
My goal: I'd like to make that when a user (facebook like social button) likes certain blog post, right data is displayed on his news feeds. In order to do that I need to extract from the teaser in the first occurrence of an image an image path inside src="i-m-a-g-e--p-a-t-h". I succeeded when a user puts only one image in teaser, but if he accidentally puts two images or more the whole thing craches.
Furthermore, for description field I need to extract text inside the first occurrence inside <p> tag. The problem is also that a user can put an image inside the first tag.
I would very much appreciate if an expert could help me resolve this what's been bugging me for days.
Text string with a regular expression for extracting src can be found here: http://rubular.com/r/gajzivoBSf
Thanks!
Don't try to parse HTML by yourself. Let the professionals do it.
require 'nokogiri'
frag = Nokogiri::HTML.fragment( your_html_string )
first_img_src = frag.at_css('img')['src']
first_p_text = frag.at_css('p').text
Related
I'm putting together a spreadsheet of PlayStation Store URLs in Google Docs, I need to grab the Title ID (CUSA), the Title Number (00473) and what I'm assuming is the package name? (LBP3GAME00000001) from the URL to use as a title in the =HYPERLINK() function, Example URL (https://store.playstation.com/en-us/product/UP9000-CUSA00473_00-LBP3GAME00000001)
What I am attempting to format the URL as: CUSA00473 - LBP3GAME00000001
(I do already have a cell with the string "UP9000-CUSA00473_00-LBP3GAME00000001" already in my sheet)
I've seen this post where someone was using =MID() to extract text located after bm_placement=, would this work for my current situation and would someone be able to explain it to me please? Thanks.
You can use the following on your source link:
=HYPERLINK(B1,REGEXREPLACE(B1,"^.*-([^_]+)_\d+","$1"))
My SEO-people do not write code. All they love is creating good texts. All they can do is pasting texts do database via some nice forms.
The problem is that sometimes they ask me: we need to put the text into page footer. Wee need to put some other text into page header.
And I just can not edit the code every time SEO-man asks me!
And sometimes the text are not related directly to model. I think you will understand me that it is a bad idea to create footer_block field inside a Car or Person model.
How nice it would if there was a gem that could:
Load text data from database by key (for example 'FOOTER_BLOCK'). To let me not to turn the models into a mess!
Give us forms where a SEO-person could paste the text
(Would be nice) Give us a WISIWIG editor.
PS: An example of such functionality (but not in Ruby): I used to code in python/Django. And we used django-flatblocks package - it did fit these 3 criterias.
I don't know any gem which will do this, but hopefully I can shed some light on how you might be able to achieve it
Code Blocks
You could create a table (and model) called code_blocks. The schema may look like this:
code_blocks
id | title | body | created_at | updated_at
This will allow you to create any number of records in this table that you want, and then call them from your app without the need for specific controller actions
Display
You could do this:
#app/helpers/application_helper.rb
def code_block(id)
block = CodeBlock.find(id)
return block.body
end
This may be inefficient, but it will allow you to include the code blocks whereever you want on the page, independent of the controller actions
So, for example, you have a footer block with id as 3, you could put:
<%= code_block(3) %>
Editing
This will mean that if you have a simple backend form, you can set it up so that you list the blocks by title, and allow the SEO guys to edit the HTML with a WYSIWYG editor (saving the HTML in the body column)
I am using Yahoo pipes to make automated Twitter Searches using terms from the description fields of an RSS feed.
Pipes makes one search from each item in the feed. Each search returns a set of results which are assigned as item.twitloop (all results)
I would like to replace the link from each item in the results with the link from the original query item;
So far I am only able to assign the original link to the first item in the results list rather than to each item.
http://pipes.yahoo.com/pipes/pipe.edit?_id=01f5f60eb8f3c22b45aa3708e5ae057a
Can anyone see where I'm going wrong?
The pipe isn't loading for me - perhaps you didn't set it as public? In any event, I have solved similar problems in the past by using the Loop module. You put the assignment into the loop (usually a string builder works well), and then have the Loop put that original link into item.link.
Currently, I'm using the gem "acts_as_taggable_on_steroids".
Everything working fine. Now I'd like to add tokeninput to this "tag input box"
All the tags existing should be displayed here as candidate tag. when the user input 1st word.
and those tags have to be delimited by " "(space)
How can I make both "acts_as_taggable_on_steroids" and token input working??
Any good instruction to archive these?
You can use RailsCast #258.
It's useful, fast and easy to implement.
I have resolved one issue which is adding new tag using the things given in this url
https://github.com/Mean-CJ/jquery-tokeninput/commit/ecb8b04df6df21b1a892187a5bcf94ff7b8d15d1
Which are commenting
//$(this).val("");
// Adding these two lines
newToken = {'id':$(this).val(),'name':$(this).val()};
add_token(newToken);
In the else part of
case KEY.COMMA:
In the js file
I want to create a tagging system like seen here on Stack Overflow or on Quora. It'll be its own model, and I'm planning on using this autocomplete plugin to help users find tags. I have a couple of questions:
I want tags to be entirely user-generated. If a user inputs a new tag by typing it and pressing an "Add" button, then that tag is added to the db, but if a user types in an existing tag, then it uses that one. I'm thinking of using code like this:
def create
#video.tags = find_or_create_by_name(#video.tags.name)
end
Am I on the right track?
I'd like to implement something like on Stack Overflow or Quora such that when you click a tag from the suggested list or click an "Add" button, that tag gets added right above the text field with ajax. How would I go about implementing something like that?
I know this is kind of an open-ended question. I'm not really looking for the exact code as much as a general nudge in the right direction. Of course, code examples wouldn't hurt :)
Note I am NOT asking for help on how to set up the jQuery autocomplete plugin... I know how to do that. Rather, it seems like I'll have to modify the code in the plugin so that instead of the tags being added inside the text field, they are added above the text field. I'd appreciate any direction with this.
mbleigh's acts_as_taggable_on gem is a feature-complete solution that you should definitely look into a little more closely. The implementation is rock-solid and flexible to use. However, it is mostly concerned with attaching tags to objects, retrieving tags on objects, and searching for tagged items. This is all backend server stuff.
Most of the functionality you are looking to change (based on your comments) is actually related more to your front-end UI implementation, and the gem doesn't really do much for you there. I'll take your requests one-by-one.
If user inputs a new tag, that tag
gets added, if user inputs an
existing tag, the existing tag gets
used. acts_as_taggable_on does this.
Click a tag from suggested list to
add that tag. This is an
implementation issue - on the
back-end you'll need to collect the
suggested list of tags, then display
those in your presentation as links
to your processing function.
Autocomplete as user enters
potential tag. You'll use the jQuery
autocomplete plugin against a list
of items pulled off the tags table.
With additional jQuery, you can
capture when they've selected one of
the options, or completed entering
their new tag, and then call the
processing function.
Restrict users to entering only one
tag. This will be your UI
implementation - once they've
entered or selected a tag, you
process it. If they enter two words
separated by a comma, then before or
during processing you have to either
treat it as one tag, or take only
the text up to the first comma and
discard the rest.
When you process the addition of a
tag, you will have to do two things.
First, you'll need to handle the UI
display changes to reflect that a
tag has been entered/chosen. This
includes placing the tag in the
"seleted" area, removing it from the
"available" display, updating any
counters, etc. Second, you'll need
to send a request to the server to
actually add the tag to the object
and persist that fact to the
database (where the taggable gem will take over for you). You can either do this via
an individual AJAX request per tag,
or you can handle it when you submit
the form. If the latter, you'll need
a var to keep the running list of
tags that have been added/removed
and you'll need code to handle
adding/removing values to that var.
For an example of saving tags while editing but not sending to server/db until saving a form, you might take a look at the tagging functionality on Tumblr's new post page. You can add/remove tags at will while creating the post, but none of it goes to the database until you click save.
As you can see, most of this is on you to determine and code, but has very little to do with the backend part. The gem will take care of that for you quite nicely.
I hope this helps get you moving in the right direction.
The more I try to force the acts-as-taggable-on gem to work the more I think these are fundamentally different types of problems. Specifically because of aliases. The gem considers each tag to be its own special snowflake, making it difficult to create synonyms. In some cases it doesn't go far enough, if you want the Tag to have a description you'd need to edit the given migrations (which isn't hard to do).
Here's what I'm considering implementing, given the trouble I've had implementing via the gem. Let's assume you want to create a tagging system for Technologies.
Consider the following psuedo code, I haven't yet tested it.
rails g model Tech usage_count::integer description:text icon_url:string etc. Run the migration. Note the
Now in the controller you will need to increment usage_count each time something happens, the user submits a new question tagged with given text.
rails g model Name::Tech belongs_to:Tech name:string
Name::Tech model
belongs_to :tech
end
Then you could search via something like:
search = Name::Tech.where("name LIKE :prefix", prefix: "word_start%")
.joins(:tech)
.order(usage_count: desc)
.limit(5)
This is starting point. It's fundamentally different from the gem, as each tag is just a string on its own, but references a richer data table on the back end. I'll work on implementing and come back to update with a better solution.