I am extremely new to Ruby on Rails, having only a couple days of experience. So far, I have created a new app, and loaded data into the database called name which is comprised of date:string, value:decimal, and unique_id:integer. So now, I can go to "(my local port)/name" and view the table successfully.
What I would like to do is this:
In a new html page, have a SIMILE Timeplot (http://www.simile-widgets.org/timeplot/) with an HTML drop-down list below it in order to select a unique_id and another drop-down box to select a year.
From there, I would like to search through the database and display all of the data on the Timeplot that matches the unique_id and that is in the specified year.
I believe I must make an HTTP GET request for a date_to, date_from, and unique_id, but I do not know how to implement this (admittedly I have been searching the web for ages, but could not figure out the solution).
Any help would be greatly appreciated! Thank you.
Edit: Even just advice on what component to tackle first
First you need to create a route for your search such as this:
match "name/search" to: "name#search" as: "name_search", via: :get
Then if you are using AJAX, and using jQuery you make an HTTP request like this:
$.get("/name/search", {
unique_id: <your_unique_id>,
date_from: <your_date_from>,
date_to: <your_date_to> },
function(result) {
// You do whatever you want with the result here
}
}
P.S:
The Javascript code might not be 100% correct, since I rarely use it.
Related
I'm running a local server playing around with an API using Django. I have a model called 'Users' populated with a few objects, and am using DefaultRouter.
I want to know what the URL would be if I were to DELETE a specific object from this model. For example, if I wanted to GET a user with an ID of 1 in this model, the URL would be: "localhost:8000/Users/1/". What would the equivalent be to DELETE this user?
I found an explanation of this on the REST API website (below), however, I don't understand what any of the syntaxes means.
What is {prefix}, {url_path}, {lookup} and [.format]? If anyone could provide an example of what this might be using a localhost that would be really helpful.
Thanks
Let us take an example of an API (URL) to update book data with id (pk) being 10. It would look something like this:
URL: http://www.example.com/api/v1/book/10/
Method: PUT/PATCH
With some data associated.
If you want to delete you just need to change method to DELETE instead of put or patch.
Regarding your second question lets compare the url with the parameters.
prefix: http://www.example.com/api/v1/book
lookup: 10
format: It specifies what type of data do you expect when you hit the API. Generally it is considered to be json.
url_path: In general, every thing after look up except query string is considered to be url_path.
My goal is very simple and I would guess it is a very common goal among web developers.
I am creating a Rails (5.1) application, and I simply want to use AJAX to get the value of a specific cell in a specific row of a specific table in my database (later I am going to use that value to highlight some text on the current page in the user's browser).
I have not been able to find any documentation online explaining how to do this. As I said, it seems like a basic task to ask of jquery and ajax, so I'm confused as to why I'm having so much trouble figuring it out.
For concreteness, say I have a table called 'animals', and I want to get the value of the column 'species' for the animal with 'id' = 99.
How can I construct an AJAX call to query the database for the value of 'species' for the 'animal' with 'id' = 99 .
Though some DBs provide a REST API, what we commonly do is define a route in the app to pull and return data from the DB.
So:
Add a route
Add a controller/action for that route
In that action, fetch the data from the DB and render it in your preferred format
On the client-side, make the AJAX call to that controller/action and do something with the response.
OK, in good old fashioned PHP MVC, I might use a model to hit the DB, send info to my PHP controller that I pass on to the View. In the View, I might take that info (say i ajax'ed my controller for the info) and create a table or ul to display the data returned.
I've had trouble finding any modern (ver 6.1 is what i'm on) tutorial to show me how to preform this action in typo3.
Can anyone just "steer" me in the right direction? Perhaps provide an example via answer, or some links to further information that may compare it down to "old fashioned MVC"?
Extension has been suggested, but I'd like to know the very base process of what I'm asking before I try writing some extension, unless the extension is the only way. Although, my table is now on the SAME DB my typo3 is on, so shouldn't there be some command to just simply call my table and get the rows? Maybe send them to a ###sub-part###?
You can use a typoscript cObj content and the select option together with the function render_obj when your table name is like the typo3 nameing convention. The select pulls the record from the table and pass it to the render_obj function. It's a function that can apply to all cObj and iterate over the entire selection. stdWrap works only on the entire cObj. When you need to work through each record you need the render_obj function. For example:
10 = CONTENT
10 {
select {
pidInList = 1
where = colpos=1
orderBy = sorting
}
table = tt_content
renderObj.stdWrap.wrap = <li>|</li>
renderObj.stdWrap.required = 1
}
10.stdWrap.wrap = <ul>|</ul>
This gives you an unorderd list from the tt_content table with pid=1 and the content from the far left column.
I started making an app with use of Jquery mobile(JQM) to be used for a customer database. You should be able to create a customer name, address etc. The information will then be stored in a MySQL database. The part I've got under control.
Now I want to do so that it is possible to retrieve customer number and name of the database again and show them in a drop down menu from JQM.
So something like:
"SELECT
kundenummer, navn
FROM
kundeskema
ORDER BY
id
DESC";
I have my database connection and my php page, but how do I get the information from where I make my sql statement and to my html page? Know it is using AJAX but dont understand how to do. I know it's a fairly simple task, but it's not for me.
plz help
Morten
You can create a PHP file which returns a JSON string of your data. Then do a jQuery ajax call to this PHP file and in the success callback create elements and add them the select element.
e.g.:
$.ajax({
url: myValues.php,
success: function(data) {
template = //create option elements
$('#mySelect').html(template);
}
});
Or
https://github.com/tkompare/projects/tree/master/ajaxexample
This is for a listview but the idea is the same
i'm working in a symfony project and using sfPropelPager to show a paged list of elements.
The problem is that with a great amount of data to list (i.e. thousands of registers) it makes a query to the database for each page to show!!!! That means about 100 extra queries in my case, and that is unacceptable.
Showing some of my code: the function that returns the pager object
$pager = new sfPropelPager('MyTable',sfConfig::get('sfPropelPagerLines'));
$c = new Criteria();
$c->add('my_table_field',$value);
$c->addDescendingOrderByColumn('date');
$pager->setCriteria($c);
$pager->init();
return $pager;
So, please, if you know a way to get all the results with only one query, it would be a great solution for my problem. Otherwise i must implement that list with an ajax call for every page the user wants to see
Thank you very much for your time.
I'm not sure to get your problem but, anyway, avoid the use of Criteria. Try to make queries with the ModelCriteria API: http://www.propelorm.org/reference/model-criteria.html.
For each paginated page, a query to the database will be done, this is the standard behavior for all pagers I know. If it's related to related objects (assuming you want to display information from relations), you may want to create a query that links those objects before to paginate, that way you'll get one query per page for all your data to display.
Read this doc for instance: http://www.propelorm.org/documentation/03-basic-crud.html#query_termination_methods
At last i did'nt get a solution for the problem, i had to implement the list via AJAX call, calling to a function that returns the requested page, so at the load of the page, no query for this list is slowing the user experience.
Thank you anyway to help me :)