I am new to symfony and open-source in general. Im trying to create a simple product submition page which would store product's information in mysql. So far I've only been able to hard-code all the information and successfully store it (this was my first task to achieve). This is the code for it:
public function createAction()
{
$product = new Product();
$product->setName('Keyboard');
$product->setPrice(15.50);
$product->setDescription('Logitech keyboard v2.00');
$em = $this->getDoctrine()->getManager();
$em->persist($product);
$em->flush();
return new Response("Saved new product with: " .$product->getId() ."Id");
}
Now I want to have a page with couple text boxes and to be able to take this information, validate it and then store it. What would be a clever way to do it? As I'm learning for my internship, I want to be able to do it in a best possible way. Are twig templates the best solution here? What about fetching user's input? I would be really thankful if someone could write step-by-step bullet points on how to achieve my goal in abstract sentences. Thank you and have a great remaining Friday!
1) One of the best and yet simple ways for you to start your mission would be by reading Symfony book chapter about Forms. It contains basic examples about form rendering, validation and submission using twig.
2) If you need to know more about how to save everything to database and would like to use Doctrine (most common way) then this chapter covers it in detail and is also not too deep to make it easy enough.
3) If you would like to deepen your understanding of Validation then you should definitely read about it too
http://symfony.com/doc/current/book/forms.html
http://symfony.com/doc/current/book/doctrine.html
http://symfony.com/doc/current/book/validation.html
Related
I'm trying to fetch "current / max Players" from this site:
http://rust-servers.net/server/64099/
I would like to display just the player numbers, eg. "70 / 175" on another website and have it update every time someone visits my .html page (I can change that one to .php if needed.)
How would I go about doing that in the most simple and efficient way?
I've googled the issue for some hours without any luck, I'm no closer to understanding what I would want to use to do this as everyone seems to suggest widely different methods and most seem way too verbose for the simple thing I'm trying to do - many examples fetch the data as JSON (?) with some JS/jQuery (?) and use a bit of code to find specific items in that data, define it as a variable or array and then display it later.
I've figured that the information I want can be referred to using XPath "/html/body/div[4]/div/div/div[9]/div[1]/table/tbody/tr[4]/td[2]/strong" but that's about it. How do I proceed from there?
Thank you.
It depends on which platform do you want to use.
If you use C#, you can use HtmlAgilityPack library.
It is basically like this:
var webClient.DownloadString("http://rust-servers.net/server/64099/");
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(htmlCode);
var node = doc.DocumentNode.SelectSingleNode("/html[1]/body[1]/div[4]/div[1]/div[1]/div[9]/div[1]/table[1]/tbody[1]/tr[4]/td[2]");
var nodeValue = node.InnerText;
I am working on a fairly simple Heat Map application where the longitude and latitude of the points will be stored in a SQL Server database. I have been looking at an example that uses an array of objects as follows (eliminated a lot of data for brevity):
/* Sample data to demonstrate Bing Maps Heatmap */
/* http://alastair.wordpress.com */
var CrimeData = [
new Microsoft.Maps.Location(52.67280, 0.94392),
new Microsoft.Maps.Location(52.62423, 1.29493),
new Microsoft.Maps.Location(52.62187, 1.29080),
new Microsoft.Maps.Location(52.58962, 1.72228),
new Microsoft.Maps.Location(52.69915, 0.24332),
new Microsoft.Maps.Location(52.51161, 0.99350),
new Microsoft.Maps.Location(52.59573, 1.17067),
new Microsoft.Maps.Location(52.94351, 0.49153),
new Microsoft.Maps.Location(52.64585, 1.73145),
new Microsoft.Maps.Location(52.75424, 1.30079),
new Microsoft.Maps.Location(52.63566, 1.27176),
new Microsoft.Maps.Location(52.63882, 1.23121)
];
What I want to do is present the user with a list of some sort that displays all the data sets that exist in the database (they each have a name associated with them) and then allow the user to check all or only a select few. I will then need to generate an array like the above to create the heat map. Any ideas on a good approach to this?
What you trying to achieve is more related to a web developement rather than only related to Bing Maps.
To summarize, you have multiple ways to do this but it really depends on what you are capable to do and what you need in the interface.
What process/technology?
First, you need to determine what process you want to follow to display the data and it will set the technology that you will use. The questions that you need to ask yourself are:
Do you want to be able to change the data sets dynamically without refreshing the whole page?
If yes, it means that you will have to use asynchronous data loading through a dedicated web service in order to avoid loading all the information at the initial load of the page.
Do you have lots of data to load?
If so, it might comfort you with asynchronous loading to avoid loading all data.
If not loading every elements in multiple arrays might be the simplest solution.
Implementation
So now, you want to create a web service to load the data asynchronously, you can take a look at the following websites :
http://www.asp.net/get-started
http://www.stefanprodan.com/2011/04/async-operations-with-jquery-ajax-and-asp-net-mvc/
There might be interesting other website, you will be able to find them. If needed, add comment and I'm sure the community will help you.
If you want to generate the data directly in the script, it could be simple as you can compose the JavaScript directly in your dynamically created HTML page (in your ASP.Net markup code or whatever technology you're using).
I have an input text box which will be used for newsletter sign ups. I want to store these emails in a table in a SQL Server database.
I have the database set up, I just don't know how I would post the data to it.
By the way the site is set up using Umbraco if that makes any difference.
If you have no experience with Umbraco or c# programming a MailChimp umbraco package might maybe help:
http://our.umbraco.org/projects/mailchimp4umbraco
Although this is not a good approach, it can be done using a Razor file. I suggest you read this blog post to get a better understanding of how you SHOULD do it: http://creativewebspecialist.co.uk/2013/07/16/umbraco-petapoco-to-store-blog-comments/
Umbraco uses petapoco under the covers. PetaPoco is a light weight database query/update tool. So you can use this to access the database table. If you don't know petapoco, this is a good time to digg in. :-)
You can add c# code inside your razor script. Everything between #{ ... } can be plain old c# code.
Below, we start with checking if the pages has been posted back. If it is, we run some code and return. If not, the rest of the page will be rendered.
#{
if(IsPost) {
var myNewValue = Request.Form["field1"];
var db = ApplicationContext.DatabaseContext.Database;
db.Update("articles", "article_id", new { title="New title" }, 123);
<div>save success</div>
return;
}
}
<form method="POST">
<input name="field1">
<button type="submit">submit</button>
</form>
Although it works (and I have done it multiple times), I don't advise you do use the code above because:
This is a very quick and dirty solution.
It doesn't follow best practices.
And it will not work with multiple forms on the same page.
(Although the last objection could be circumvented by adding a hidden field to check which form you submit...)
Hi, i have been having some problems using JSON data in flash builder lately and I was hoping someone could help me out here.
I have spent the past month working solidly on this issue, so I HAVE been looking around, HAVE been trying out everything I can find or think of. I am simply stuck.
I have been working on a flex mobile application for the Blackberry Playbook tablet with Adobe Flash Builder 4.6. It is a reddit app, designed to give users the main reddit feed, subreddits, search function, hopefully log in stuff etc. Of course I need the aid of the reddit API to access this information, of which the documentation can be found here: https://github.com/reddit/reddit/wiki/API/ The api uses either XML or JSON formatted data.
Now onto my problem- Like mentioned above, i want to display the reddit feed inside the app. I want to be able to use a item renderer to customize the data that is shown within each entry of the list.
One entry would consist of:
1) a thumbnail of the image in the post
2) The title of the post
3) a 'like/dislike' button, but this is unimportant at the moment.
Of course to start out, i placed a spark List component onto the design view. Then i configured a new HTTP data service using the Data/Services panel. I specified http://www.reddit.com/r/all.json for the url. I configured the return type, and the did a Test Operation. Everything connected just fine. All the data came through as normal. I will give you an idea of what the data comes back as so that you may understand my issue later on.
Test Operation Results (json data structure):
NoName1
data
after
before
children
[0]
data
media_embed
score
id
title
thumbnail
url
(etc etc...)
kind
[1]
data
media_embed
score
title
thumbnail
(etc etc...)
kind
[2] (array continues)
modhash
kind
As you can see, to get to the thumnail for example, you would have to go through data.children[].data.thumnail. When I tried to bind this data to the spark List component, I specified the data service to be from the one above. Then I specified the Data provider option to be Children[], as this value is typically set to the array. Now this is where the trouble begins. The final option, Label Field, only gave me one value to choose from: 'kind'. So as you can tell, it wasnt expecting the data to go any further nested. It stops at the two value just within each array item, which would be Data and Kind, though it only offers me Kind. I need to go one level further to access Title and Thumbnail. This is my problem.
Now, I have analyzed the code for the binding, and I have tried altering it to accomodate the further nested value. No success what so ever. The following is the code that the binding generates:
<s:List
id="myList" width="100%" height="100%" change="myList_changeHandler(event)"
creationComplete="myList_creationCompleteHandler(event)" labelField="kind">
<s:AsyncListViewlist="{TypeUtility.convertToCollectionredditFeedJSONResult.lastResult.data.children)}"/>
<s:List>
Obviously i would want to have something like along the lines of:
"TypeUtility.convertToCollection(redditFeedJSONResult.lastResult.data.children.data" and then set the labelField="title" or "thumbnail".
I certainly hope someone can help me with this. I am out of my mind as to what to do. If you need any further clarification I would be happy to provide it. I tried to explain the situation above as clearly as possible. Thank you so much.
Ted
I have this situation often: get an XML or JSON data from the server, then trying to use it as a dataProvider for a spark.components.List or for a mx.controls.Menu and then they just wouldn't display the data as I want them, because something in the data is different from what they expect. And then they display wrong XML-children or [Object,Object,etc.]
And in such cases I just create an empty ArrayCollection() which serves as dataProvider instead (and can be sorted and/or filtered too). And when data comes from the server, I push() new Objects into it:
[Bindable]
private var _data:ArrayCollection = new ArrayCollection();
public function update(xlist:XMLList):void {
_data.length = 0;
for each (var xml:XML in xlist)
_data.push({label: xml, event: xml.#event});
}
This always works. And if you get your next problem - flickering of the List, then that is solvable by merging data too.
Good luck with your Playbook development, which is a cool piece of hardware :-)
I'm developing an interface between an old web based application and another one. That old web-based application works fine but there no exists any API to communicate with.
There is any programmatic way to say a web-form something like: enter this value on this field, this one ins other and submit form?
UPDATE: I looking for something like this:
WebAutomation w = new WebAutomation("http://apphost/report");
w.forms[0].input[3].value = 123;
w.forms[0].input[4].value = "hello";
Response r = w.forms[0].submit();
...
Despite the tag on your question, the answer is going to be highly language specific. There are also going to be wide range of solutions depending on how complex of a solution you are willing to implement and how flexible a result you are looking for.
On the one hand you can accomplish a lot in a very short period of time with something like Python's mechanize, but on the other hand, you can really get into the guts and have a lot of control by automating a browser using a COM object such as SHDocVw (Windows-only, of course).
Or, as LoveMeSomeCode suggested, you can really hit your head against the concrete and start forging POST requests, but good-luck figuring out what the server expects if is doing any front-end processing of the form data.
EDIT:
One more option, if you are looking for something that you can come up to speed on quickly, is to use a AutoIt's IE module, which basically provides a programmatic interface over an instance of Internet Explorer (its all COM in underneath, of course). Keep in mind that this will likely be the least supportable option you could choose. I have personally used this to produce proof-of-concept automation suites that were then migrated to a more robust C# implementation where I handled the COM calls myself.
In .NET: http://watin.sourceforge.net/
In ruby: http://wtr.rubyforge.org/
Cross platform: http://seleniumhq.org/
You can, but you have to mock up a POST request. The fields (textboxes, radio buttons, etc.) are transmitted as key-value pairs back to the resource. You need to make a request for this resource(whichever one is used in the SUBMIT action for the FORM tag) and put all your field-value pairs in a POST payload no the request.
Here's a good program to see what values are being transmitted: http://www.httpwatch.com
Or, you can use Firebug, a free Firefox extension.
The Perl module WWW::Mechanize does exactly that. Your
example would look something like this:
use WWW::Mechanize;
my $agent = WWW::Mechanize->new;
$agent->get("http://apphost/report");
my $response = $agent->submit_form(
with_fields => {
field_1_name => 123,
field_2_name => "hello",
},
);
There is also a Python port, and I guess similar libraries exist for many other languages.