I'm trying to create an iOS application where users post and image, and then someone can comment on the image. So far I've set up the a message class which contains (among other things) the image file. I want to be able to add comments to the image, so what would be the best way of doings this.
Option A:
I could add an array (or object?) column to the already existing message class, and then store in this array the comment (string) and the id of the poster (string). For this I think I would need a two-dimensional array, but I'm not sure how I would go about doing this.
Option B:
I could make an entire new class of comments which contains the user's comments (string), as well as the image file that he/she linked to (perhaps though a PFRelation)
Basically I'm leaning to Option A, because it seems easier/more efficient to implement, but I don't really know how I would go about creating a two-dimensional/array of objects - so my question is, how would I go about doing this?
The way I did it in my app is option B. I then added a count column to the photo that was incremented/decremented onSave or onDelete. I think this method is better because it keeps the data more symmetric (with option A some data could have thousands of comments while others would have 0). Additionally, it allows you to query the comments cell if you wanted to have a notification view where you showed the user what activity has been done on their photo.
Related
I am taking a database design class and for a project want to make a database of my mom's digital photos for her. I haven't dealt in application up to this point, only theory, but I have Access. Therefore, ideal answers don't suggest non-database solutions and don't assume I know much about actual database implementation. Solutions specific to Access could also be a plus. I hope that precursor saves some time and effort.
Theoretically, my mom wants to see all photos of pets from '05-'07 in raw format, and she enters an appropriate query. I suspect I can handle it up to there. However, at the moment, the best I can figure out to do is to return a column of either attachments or OLE objects. 5 clicks per photo is not ideal. I need a faster way to present the images. Opening them all in a grid of thumbnails or as a one-click-slide-show would seem the natural fit, but whatever works. How can I accomplish this?
Less important but worth consideration is the fact that, at some point, it would be great if this same type of system could be implemented on the internet for all of the family reunion photos she has taken, but I will take what I can get.
Use one form to get parameters for the query. then use another form(more processing) or report(if printing) to show the selected pictures. I will not cover passing parameters but here are some links.
https://www.fmsinc.com/microsoftaccess/forms/openargs/index.htm
https://learn.microsoft.com/en-us/office/vba/access/concepts/forms-design/apply-a-filter-when-opening-a-form-or-report
There is a complication, in Access pictures are usually stored in the attachment type. the attachment column can hold many pictures in each record. So if we have a table called Pictures with an attachment type column also called Pictures, then each individual picture is actually stored under Pictures.Pictures.FileData.
So to display the picture query we use a form/report with default view set to Continuous Forms (displays many records or in this case pictures on the same page) then in the details section of our Display form we place an attachment control and bind that control to our filtered Pictures.FileData.
Format and add functionality to taste.
I need to show the Product's Name in the Menu, I think image says it all:
Click here to see the image
I have a menu, with two options, and the first show a text with a variable, but {!Product} don't works, there is a way of this work?
When I put {!Product} in Message or Question, this works normal...
I didn't find any solution for showing the variable in the title dialog, my solution was to change the message to "Know more about this product", I left a generic message.
Old topic but the answer might help someone.
There's a great article explaining how to get some dynamic information https://www.infallibletechie.com/2021/11/how-to-create-case-from-einstein-bot.html
In your case, I guess you need to
Query your products (the out-of-the-box Einstein Bot query is simple and has a limit of 3 items but you could call a flow or apex to get better granularity on the filter/logic and control le size)
Store the query result in a Custom record list Variable
Query data with a flow
Use a dynamic question and merge fields to display what you want
Top configuration of the dynamic question
Down configuration of the dynamic question
Sorry if my question is silly but I'm new to DNN/2sxc, I've spent the whole day trying to figure this with no success..
I have two instances of the same app, one in the home page and the other on its own page, each one must have its own view template (I use Razor).
My problem is I cannot figure a way to make the two apps read the same data, so every add/edit/remove/re-sort in one of them will be reflected to the other, currently each app has its own data and therefore they are unusable in my case.
I've tried to use a 'EntityTypeFilter' inside a 'Data Query' and use it in both views (as in the News-Simple demo video), it worked and gave me all the items in the two views, but another two problems come with this solution:
1- now I'm unable to use the toolbar to (add/remove/reorder,.. etc) any of the items , as you can see in this image, which is a show-stopper for me,
note: this is the toolbar I use:
#foreach(var item in AsDynamic(Data["Default"]))
{
...
#Edit.Toolbar(target: item, actions: "new,edit,replace,remove,moveup,movedown,instance-list")
2- the 'Content Demo Item' is also visible in the list, but it is not that important since I can delete it and use one of the real data items as a demo item.
I appreciate any kind of help.
Thank you.
So the first thing you should know is the difference when using content-items as data (to query, etc.) and when using it as assigned-items (where each module-instance has a subset of items). Here's the blog that should help you understand the difference: http://2sxc.org/en/blog/post/12-differences-when-templating-data-instead-of-content
So when you want the "manually and easily control the exact items displayed, their ordering etc." you want to use the "content-assigned-to-instance" which also gives you the simple add, delete buttons, as these don't really delete anything, but just remove the assignment from the module-instance.
Now your case is a bit special, in that you want to re-use the exact same set in another module-instance. There are a few ways you can do this:
Same View
if it's exactly the same view etc. just duplicate the module using DNN-features (the add-existing-module-to-another page)
different view
if it's a different view (maybe more compact, etc.) you again have multiple options. The first is to mirror / duplicate using the dnn-feature, and just put an if-im-on-this-page-then-show-differently or inject another CSS. That's probably the easiest without any dev-know-how.
The harder, but possibly nicer way, is to actually to use a new template, and tell it to retrieve the items in the way they are configured in the other module - let's say module 1 is the original, module 2 has a different template wanting to access the items of module 1 in exactly the same order as given in 1. They way to do this is simple, but requires a few lines of C# code in Module 2.
You need to create a new ModuleDataSource (https://2sxc.org/en/Docs/Feature/feature/4542) object and tell it that it's from Module 1. If you've never done this, it's basically that your code can create a query just like the visual designer, but you have more control - see the wiki https://github.com/2sic/2sxc/wiki/DotNet-DataSources-All. The Module-Data-Source in the visual-query-designer doesn't allow you to "switch" modules (a advanced setting we may add in the future) but the object has a ModuleId property which you can set before accessing the data, making it "switch" to that Module. here's the Pseudo code in your Module#2 razor...
var otherModData = CreateSource<ModuleDataSource>();
otherModData.ModuleId = 1;
foreach(var itm in AsDynamic(otherModData["Default"])) {
...
}
That should do it :)
In my web application, there are several classes whose instances need an image (i.e., photo). Each of these instances can have only one image. Currently, my implementation is that when user creates a new instance, I keep the name of the uploaded file as it is, and record it in the ImageUrl field of the associated table.
I feel like this is unnecessary. I can just rename the image with the unique url of the associated instance, and I can implement the programming logic accordingly. For example, if a user's id is 145, then I can record it with this name: profilephoto_145. Later, when I need to display the user's photo, all I need will be the id of the user. If user uploads a new file, I can just overwrite the existing file with the same name.
I wonder if this makes sense assuming each instance will have one associated image, and there will be no need to keep track of the previous files. What is the common approach for this? Should I keep the full path for each image and keep their original names, or should I implement this renaming files with ID?
I can just rename the image with the unique url of the associated
instance, and I can implement the programming logic accordingly. For
example, if a user's id is 145, then I can record it with this name:
profilephoto_145.
Yes, you can do that. The general search term for this kind of thing is "tight coupling" or "coupling and cohesion". The concept applies in lots of different areas of software development.
Your underlying idea is that you'll always store one profile photo per user, and you'll store it by concatenating "some kind of path" and "profilephoto_" and user's id. The main problem is that any change to that idea requires changing source code. And changing source code has ripple effects.
The common alternative is to store the image file's name in a database. In this case, most changes to that underlying idea would require only a database update.
Programmers who have been around a while cringe a little when people start using words like always and never. Because we know that, given enough time, statements that use always and never with respect to software are always never true.
I just can't seem to wrap my head around Drupal relationships. I have been reading and watching tutorials, but as soon as I try to get my own project done - I fail. I think it's very basic, so I would love to understand it. Maybe someone here can help me understand how it works :)
On my drupal site, I want to keep track of some private game tournaments.
I have created a content type called contestant, which has fields like: Tournament date, Player name, Final Position. I can then create a view that list the information from one tournament. I used the help I got from this thread: drupal views dynamic filter
I would like to have the view described above as a block. And then place that block-view on a "tournament description" page. I could do this, by simply creating a new block each time, and then manually place it on the page it should be shown (structure-->Blocks-->configure), but that is not an elegant way to do it. I am pretty sure this is where Relationships should be used. But I fail to understand how to create this relationship, so that the specific block view, that matches the specific tournament description page will be displayed together.
Use a Content:Nid as a Contextual filter.
WHEN the Filter value is not in the URL >>
Provide default value
Content ID from URL