I'm stuck on how to approach the design of this problem - or even how to search for answers. I'm still a bit new with Django. The goal is to have a user select one or more locations (libraries in my problem) from a list of locations. I'd like the user to be able to type in an address and then have the list of locations filter based on distance between the locations. I envision the list of locations to be selection field. I'm assuming there will be an input field for the distance (canned choices or just a whole number) and a button to apply the filter.
I know how to get the user's location (as a postal address) converted to lat/long using py-geocoder. I have the lat/long of each library. I know how to calculate the distance between two points (py-haverstine or maybe geometry-distance).
Where this seems squirrely is the mechanics of filtering the list. How would I do the "filter" action (submit) versus the "save" action if I'm using a model based view? So far, when I hit the server, I've been processing the form as a submission, not a portion.
Or would this be better done client-side as js (which I don't know, but I assume someone has done this already)?
Related
I'm developing an web app with Django to query and download data from multiple weather stations. It's almost everything good but something that I don't like it's that when I filter by stations, the form passes them to the URL like this:
https://my-server/stations?station_name=1&station_name=2&station_name=3
And since the number of selected stations can reach more than 250 (this added to the fact that spatial data are also passed in the URL as coordinates, polygons...), I would like to know if there is any way to obtain the "station_name" parameter in a list format like this or similar, for me to later divide it in my views.py:
https://my-server/stations?station_name=1%3B2%3B3
On the other hand, I'm not sure if there are any contraindications when generating too long URLs, if not I have no problem maintaining the current format, but otherwise I would like to find a solution.
Thanks in advance
Edit: If it helps, I'm using the Select2MultipleWidget widget for this field.
I’m not sure where to start on this project. I know how to read the contents of the excel spreadsheet, I know how to identify the header row, I know how to loop over the contents. I believe I have the UX portion worked out but I am not sure how to process the data.
I’ve googled and only found .Net solutions but I’m looking for a ColdFusion/Lucee solution.
I have a working form allowing me to map a user's spreasheet column to my database values (this is being kept simple for this post; user does not have direct access to the database).
Now that I have my data, I'm not sure how to loop over the data results. I believe there will be several loops (an outer and an inner). Then of course I also need to loop over the file contents but I think if I can get the headings mapped out,I can figure out the remaining.
Any good links, tutorials, or guides would be greatly appreciated.
Some pseudo code might be enough to get me started.
User uploads form
System reads headers and content.
User is presented form with a list of columns from their uploaded spreadsheet to match with available database fields (eg “column1” matches “customer name”.
User submits form.
Now what?
UPDATED
Here is what the data looks like AFTER the mapping has been done in my form. The column deliiter is the ::: and within the column the ||| indicates the ID associated with the selected column value. I've included the id and the column value since I plan on displaying the mapping again as a confirmation. Having the ID saves a trip to the database.
If I understand correctly, your question is: how do you provide the user a form allowing them to map their spreadsheet columns to that of the database
Since you have their spreadsheet column names, and you have the database column names, then this problem is essentially a UI/UX problem. You need to show both lists, and allow the user to map them. I can imagine several approaches to this. My first thought would be some sort of drag/drop operation, as follows:
Create a list of boxes, one for each field in your database table, and include the field name in (or above) the box. I'll call this the db field list. Then, create another list for each column from the spreadsheet, which I'll call the spreadsheet column list. The user would drag/drop items from the spreadsheet column list to the db field list.
When a mapping has been completed by the user, you would store the column/field names in as data for the DOM element of the db field list box. Then upon submission, you would acquire the mapping data by visiting each box and adding it to an array. Then you would serialize that array into JSON and send that to your form submission handler.
This could be difficult or easy, depending on your knowledge of UI implementations using JavaScript. jQuery makes this easy (if you know jQuery). There's even a jquery UI plugin that does this: https://jqueryui.com/droppable/.
A quick search for javascript drag drop would help, and here's a few articles I found:
https://www.w3schools.com/html/html5_draganddrop.asp
https://medium.com/quick-code/simple-javascript-drag-drop-d044d8c5bed5
You would also need to submit the array of mappings using javascript. You could search for that as well, and here's an article I found:
https://codereview.stackexchange.com/questions/94493/submit-an-array-as-an-html-form-value-using-javascript
I have a tabular form which is updated throughout the year and i wanted to prevent users from editing certain rows. Currently the 'row type' is hard coded however I want the application admin to control which 'row types' are readable / write at certain times. My answered question, click here.
Currently a dynamic action is fired which prevents the rows that contain the type 'manager figure' and 'sales_target' being edited.
I have created a table with the three row types against each customer. Each status is set by a number: 0 to 3 (These i will decode into something meaningful for users).
0 - Row with that row type is read only.
1 - Users can enter into the row with that row type.
2 - row is read only with that row type.
3 - row is complete and set to read only.
I have created a new form (new tab) for the admin user to maintain each status.
Currently for Customer 'Big Toy Store' rows should be set as follows:
Manager Figure row should be read only (since set to 2)
Sales should be readable (since set to 0)
Sales target should be writable (since set to 1)
Please can i be pointed in the right direction, ive looked into jquery but struggling to work out how to pass the output of an sql query to it, so it can be used to determine which rows should be read only.
Link:apex.oracle.com
workspace: apps2
user: developer.user
password: DynamicAction
application name: Application 71656 Read only Rows for Tabular Form
I'm not sure that a tabular form is a good format to work out this idea. As you can see, you require quite a bit of javascript to produce the results you want. Not only that, but this is all client side too, and thus there are some security risks to take into account. After all, I could just run some Firebug and disable or revert all things you did, and even change the numbers. Especially with sales figures, which is something you most definitely do want altered by everybody and is also the nature of your question, security is important.
There are more elegant ways here for you to control this, and not in the least to reduce the amount of highly customized javascript code. For example, you could do away with the tabular form, and instead implement a modal popup from an interactive report. Since the modal popup would be an iframe and thus a different page, you can create a form page. On a form page you have a lot more control over what happens to certain elements. You can specify conditions, read-only conditions, or use authorization schemes. All things you can not evidently use in a tabular form.
I'd think you'd do yourself a service by thinking this over again, and explore a different option. How much of a dealbreaker is using a tabular form actually?
You need the user. You need to know what group he belongs to, and then this has to be checked against the different statusses and rows have to be en/disabled. Do you really want this to happen on the client side?
I'm not saying it can't be done in a tabular form and javascript. It can, I'm just really doubting this is the correct approach!
I'm trying to find the best way to go about my problem and I would love your input. I am trying to allow users to scan multiple barcodes into a text area. After they are submitted they are split into an array. The user then inputs how many iterations of each value in the array are to be inserted into a MySQL database. I've achieved this using PHP and session variables, looping through the array one step at a time. With Django I've found it a little more difficult and I am wondering if I should just have a "temporary" table in my database that gets refilled with the values from the array of barcodes. The following pages then pull each value from the table instead of using any sort of session variables.
Edit:
I apologize for the confusing question. Let me try and clear it up a bit:
I need to render a view based on each value in the user-submitted array. When it is first submitted, a view is rendered for the first value. When the user hits "Next" a view will be rendered for the second value in the array, and so on.
As for the database issue, each value can have two "types." The user will declare how many of each type is added to the database in each of the views I am trying to render.
Thank you.
this is nothing about django.
forget that temporary table.
add a field "filled" to ur table
select 1st not-filled row, and show "refill" page by this row
then update user input number back to db, set "filled" to "true" at same time.
You probably can port your PHP solution using a Django session object.
I'm not sure if that "one item at a time" is a feature or a "it was easier to code that way" thing, but in the second case - you may want to use Django Formsets to display all items at once and avoid looping through the array.
I'm trying to make a Django order system that requires 2 forms. The first form, lets users choose some some quantities and basic contact info some. Then, using the quantities of each item they ordered I generate a 2nd form which allows them to choose some options for each item. This system is specifically for event tickets. Here are the 2 stages:
1) Get the order info such as name, address, phone of the person placing the order. Also find out how many people are coming to each of the possible events.
2) Based on the number of people per event, get their name and e-mail address.
I already have both forms created. I am just getting tripped up in the views. When they submit form 1, I need to take that info and save some of it and then send them to form 2. At form 2, they will fill out the rest of the info and finish processing.
How would you set up the views in such as case? I essentially nee-d to call on view form another and pass data between. I tried using kwargs, but I have trouble processing the second form.
Without seeing your models, it's hard to give an exact solution, but one approach is to have two separate views, one for each form.
Once you've processed the first form, you're most likely going to have an instance of some object that you created from the first form. It sounds like you just need to pass the id of that object to your next view where you could then get that object and do whatever association you need.
Also, it sounds like you might need to be collecting data from several instances of a form...
(2) Based on the number of people per event, get their name and e-mail
address.)
You'll want to use a formset for that.