I have an app that allows you to upload a recipe to the db, as part of the app i would like to have a "Featured Recipe" that is called randomly from the recipe db. I am using this method to call a random record
#featurerecipe = Recipe.offset(rand(Recipe.count)).limit(1)
As expected when i refresh the page the record changes, however I would like the random record to stay in place for say 24 hours, even when the page is refreshed. I'm looking for some advice on how to go about this or perhaps someone else has done this in a project of their own? I was thinking that you could have a db column called feature and then set a "true" value to it, set everything else as false and then somewhere a loop needs to occur to check the time spent at value "true", then after 24 hours pick another random recipe?
I may be well off here, any help appreciated
As you mentioned, add a "featured" flag to the table. Setup resque/resque-scheduler or delayed job to run every 24 hours and select a new item at random.
Related
I have the following problem with my VI, which I could not solve by myself or research:
When running the VI, the data should be stored in a .csv-File. In the pictures, you can see the block diagram. When running, it produces the following file:
Test Steady State
T_saug_1/T_saug_2/Unbelegt/Unbelegt/T_ND/T_HD/T_Wasser_ein/T_Wasser_aus/T_front/T_back/T-right/T-left
18,320 18,491 20,873 20,838 20,463 20,969 20,353 20,543 20,480 20,618
20,618 20,238
As you can see, the data gets stored only in the first column (in the preview of the post it looks like it is a row, but it is really a column; T steady state is the header). But these temperatures are not the temperatures of the first sensor, it somehow stored the value for every sensor in the respective row. When the first row was filled, it stopped storing data entirely. I did not figure out how I could insert a file here, otherwise I would have done so... I want to store the data for each sensor in the associated column.
Another problem I have: the waveform-chart, which shows all the temperatures, only updates every 4-6 seconds. Not only is the interval between every update not always the same, but from my understanding it should update every second since the while-loop has a wait-timer set to 1000ms. I don't know what my mistake here is...
Please let me know if you have any ideas on how to solve the problems I have or suggestions where I could find answers to my questions. I am very new to LabVIEW, I am sorry if this question is silly.
With best regards an thank you for the patient help,
lempy.
csv-file
Block diagram
DAQ-Assis. for PT100
DAQ-Ass. for TC
The Write Delimited Spreadsheet VI has two boolean inputs: Append to file? and transpose?
Append to file? is not set for the first write, which defaults to FALSE. That means, on each write, the file is overwritten. For the second and third call, it is set to TRUE, so those data is appended.
The most simple solution is to put the first two write functions outside the main loop. This overwrites the file at start of the VI with the headers, and values will be appended as desired.
transpose? will swap rows and columns. Wire TRUE to it, and check if it works.
About your second question:
A loop runs as fast as the slowest process inside. If the graph is updated every 6s only, something takes 6s to complete. My guess is that those temperature readings take so long...
I am trying to update the textbox for the current request that I have opened. After making changes to the bound textbox (regardless of the record number current being edited) it modifies the tblVendorRequests.VendorDiscussionNotes for the newest request created within the table.
My form is a Single Form
My record source for my form is a table (tblVendorRequests)
My textbox (txtVenConLog) is using tblVendorRequests.VendorDiscussionNotes as its control source
For instance, say I am trying to add notes "Hello World" to request number 242. Request 242's notes remain the same, but the "Hello World is added to the newest record instead (overwriting the existing text that was in the request).
I have done a good amount of searching on the topic, and have not found a satisfactory answer on why this would be.
Any ideas would highly appreciated!
I redesigned my form to split the functions into 2 separate forms and that seems to have resolved the issue. I believe the issue was that when I 'opened' a record, it was not behaving like it would if the record-opening function resulted in calling a form to open with specific criteria.
Okay, I know this question has been half answered around here, but I'll explain in full and see if there maybe a better way to handle this then in just two parts.
I'm building an HTML5 voting site, that will close voting every half hour. And then open a new batch of voting.
What I need to do, is have the URL of this site be 'masked' ie:
have a random URL for it be generated that leads to the same location- so say I'm directing users to voting.com, I want them to only access it via the url votingstuff.com/hg67, and have that end portion be changed every half hour- and once the new url is generated, remove access to the site via the old URL.
I might add that after the user votes, I'd also like to close their voting access until the new URL is posted. AKA- everyone only gets one chance to vote.
Thoughts? Libraries to check out? Sites that do this? I know the randomization has been answered a few times, but usually it's a generator led to by a page, I want to START with a randomly generated URL, and not have a page that creates it as a function. I may have to write code that generates the page I guess?
Here is an approach I can think of -
You don't need to handle multiple URL's, you can achieve this on the same URL itself by enabling/disabling access to the URL content every hour.
You will need some action on your application/server side as well. For reference lets assume you have a PHP server running. You will need some table that holds a status setting for you, something like this -
Settings Table
id settingCode value
=============================
1 votingOpen 1
You will also need to setup a cron job on your server that will run every half an hour. The cron job's task would be to run every half an hour & change the value of the votingOpen to its inverse. So assume open your votings, initial value of the votingOpen field would be 1 i.e the first half an hour of voting starts.
Along with this you will start the cron job as well. Now what will happen is that after half an hour the cron job will fetch the value of votingOpen read it & if its 1, it will change it to 0 & if its 0 it will change it to 1. This will happen every half an hour on your server.
Now you need to make this votingOpen variable accessible on your client side code using a simple query to fetch its value. On each render of your voting page, on top somewhere you can check this value & if its 1 i.e true, you will write the logic to go ahead & show the voting page. But if its 0, you can redirect the user or show a different message on that page.
Lets say your voting happens on http://somedomain.com/voting, on the render logic of this page you can do something like this -
Voting View Logic
<?php
$votingOpen = {some database query that fetches the value from the database};
if($votingOpen) {
// your voting view resides here
} else {
// either redirect user to some other page
// or show some message like voting is closed on this same page.
}
?>
Limit multiple votes from one person
Normally the best way to handle this is a combination or registered user only vote + cookie/localStorage + IP tracking
But if you don't have registered user voting, you can still capture IP of user & allow only one vote per IP and you can also set a cookie or a localStorage variable in the users computer so he can only vote once.
Hope this helps.
Ref for Cron Job - http://code.tutsplus.com/tutorials/managing-cron-jobs-with-php--net-19428
I am currently getting products from one site, storing them in a database, and then having their prices display on another site. I am trying to get the prices from the one site to update daily in my database so the new updated prices can be displayed onto my other site.
Right now I am getting the products using an item number but have to manually go in and update any prices that have changed.
I am guessing I am going to have to use some kind of cronjob but not sure how to do this. I have no experience with cronjobs and am a noob with php.
Any ideas?
Thanks!
I have done some reading on the foreach loop and have written some code. But my foreach loop is only running once for the first item number. The foreach loop runs then goes to the "api.php" page but then stops. It doesn't continually loop for each item number. How do I tell it to go through all of item numbers in my database?
Also if you see anything else wrong in my code please let me know.
Thanks
....
$itemnumber = array("".$result['item_number']."");
foreach ($itemnumber as $item_number) {
echo "<form method=\"post\" action=\"api.php\" name=\"ChangeSubmit\" id=\"ChangeSubmit\">";
echo "<input type=\"text\" name=\"item_number\" value=\"{$item_number}\" />";
echo "<script type=\"text/javascript\">
function myfunc () {
var frm = document.getElementById(\"ChangeSubmit\");
frm.submit();
}
window.onload = myfunc;
</script></form>";
}
}
If you already retrieve the product data from an external site and store it in a local database, updating the prices from the same source should be no problem to you. Just retrieve the data, iterate through it in a foreach loop or similar and update the prices to the database based on the item number.
Once you have created the update script and run it manually, adding it as a cronjob will be as simple as running the command `crontab -e´ and adding this row to execute your script every midnight:
0 0 * * * /usr/local/bin/php /path/to/your/script.php
Don't forget to use the correct path for PHP for your system, running which php in the shell will tell you the path.
If you have cronjob's on your server, it'll be very apparent- You make a PHP script that updates it, and throw it in a daily cronjob.
However, I do it this way:
Method 1: At the beginning of every page request, check the last "update" time (you choose how to store it). If it's been more than a day, do the update and set the "update" time to the current time.
This way, every time someone loads a page and it's been a day since the last update, it updates for them. However, this means it's slower for random users, once a day. If this isn't acceptable, there's a little change:
Method 2: If you need to update (via the above method of checking), start an asyncronous request for the data, handle the rest of the page, flush it to the user, then in a while loop wait until the request finishes and update it.
The downside to method 2 is that the user won't see the updated values, but, the benefit is that it won't be any more of a wait for them.
I want to display a "Please Wait" form while a 60+ second query is running. I have the query and the form made (easy enough), except the macro won't bring them together. Here is my autoexec macro:
SetWarnings=False
Open Wait Form
Run the query & Display Results
Close Wait Form
The problem is that I can only see the outline of my wait form while the maketable query is running. I can only guess that the macro doesn't wait for the form to completely load before going to the next step.
And just for fun:
The Wait form has a Timer that shows the number of seconds elapsed. How do I run the query while still allowing the form to update itself at the same time?
-------Update----------
Repaint only updates the background color before moving on to the query. I also tried 6 repaints in a row with no difference (I thought that might get around the bug you people mentioned). The form is very simple. A single text box that uses "loading" for the control source and a timer function (disabled for the moment). Here is my macro in slightly greater detail:
SetWarnings=False
Open Wait Form (modal=yes, popup=no)
Repaint the form
Open a maketable query (this query saves alot of time)
Close Wait Form
Open the display query
Firstly, you just need to Repaint the wait form after it is shown for it to show correctly, it's just a bug in VBA that sometimes causes forms not to be displayed properly even if they are drawn at the correct point in the code.
Secondly, if you set the wait form's ShowModal property to false then you will be able to update it through your routine. I use a public function that takes a 0-100 argument to update a progress bar. This works best in a loop where you can normally calculate the number of loops remaining and provide an accurate guide to the elapsed progress, but even when performing a series of operations you can time and pass suitable values through to the progress form so that the user is kept informed. This works better than most Windows progress bars!
The first problem is easy to solve, try putting me.Repaint before the query runs, sometimes access can get a bit lazy with screen painting and you have to force it.
As for the other thing that is a bit more complicated. You would have to execute the query asynchronously. You can do this in ADO by adding the adAsyncExecute option when executing the query. You would then catch the finishing event to tell the users the query is done
Here is a link on the Microsoft knowledge base http://support.microsoft.com/kb/262311
If you are using an Action Query you can track the number of executed rows by using a vba-function which returns the same value that was passed to it. Of course you have to know the total number of rows, to know when the query is done or display progress (This can often be achieved relatively fast using a lightweight counting query*).
'first some global vars to keep track of the number
Dim lngCurrentRow as Long
Dim lngTotalRows as Long 'We assume lngTotalRows have been set elsewhere
'Here is the function
Public Function UpdateProgress(FieldValue as Variant) as Variant
lngCurrentRow = Nz(lngCurrentRow, 0)
If (lngCurrentRow >= lngTotalRows) then
MsgBox "Query Done!"
Else
'Do stuff to show progress
End If
lngCurrentRow = lngCurrentRow + 1
End Function
For displaying the progress I have used an Unbound form, with an empty textfield with transparent background (progressFrame) and a label (progressLabel) which has a blue background and is placed behind the textbox to the left. For each call to UpdateProgress you can then set the width of the label:
progressLabel.Width = progressFrame.Width * (lngCurrentRow / lngTotalRows)
*: F.ex. if the query is based on one table, with some added data, so that the number of records the query will produce is equal to that of the table, a count can be done on the table alone so that it will be faster..
I hope this was helpful, or at least inspiring :)
I had the same issue with a pop up form which took a few seconds before it displayed the text which informs the user that something is processing so please wait. I added the line of code below after the code which opens the form and before the next bit of code which runs the update queries (which takes a while hence the need to inform the user that something was processing)
DoCmd.RepaintObject acForm, "frmMyForm"
Works perfectly for me.