I have a loop to select 'LibrarySwaps' for tomorrow.
This works, but not when I set days_ahead default to 1 (it returns records with todays date).
Why do I need to add 2 to the date to get a day than is only 1 day in the future?
I am doing this 11am EST so this is not a time zone issue with that and UTC both being the same day... I thought maybe 'cos one side has a time component and the other doesn't but nope, I'm using date() for the sql and Date + 1.days for the ruby. I may switch to (one date minus the other date) and look at the result.
Thanks!
Returns Tomorrows (uses 2):
def self.find_future_swaps(days_ahead=2)
#upcoming_swaps = LibrarySwap.all(:conditions => ['date(suggested_date) = ?',Date.today + days_ahead.day ])
end
Returns Todays (uses 1):
def self.find_future_swaps(days_ahead=1)
#upcoming_swaps = LibrarySwap.all(:conditions => ['date(suggested_date) = ?',Date.today + days_ahead.day ])
end
MySQL is likely storing your suggested_date field in UTC. So an entry from 10pm on 4/29 would actually be stored as 3am on 4/30 (assuming you're in the Eastern timezone).
You can do this to add the offset to the times you're searching for:
#upcoming_swaps = LibrarySwap.all(:conditions => ['date(convert_tz(suggested_date,'+00:00','-05:00')) = ?',Date.today + days_ahead.day ])
Related
I would like to request the last 30 days of CrewHu Import data from today's date in this query. At the moment it is just set to get everything greater than the 25th September 2022 but I want to change this to be a dynamic value. Has anyone else had this problem / knows of a workaround?
let
Source = Json.Document(Web.Contents("https://api.crewhu.com/api" & "/v1/survey?query={""_updated_at"":{""$gte"":""2022-09-25T00:00:00.000Z""}}", [Headers=[X_CREWHU_APITOKEN="xxxxxxxxxxx"]])),
I've tried:
OneMonthAgo = Text.Replace(Text.Start (Text.From(Date.AddDays(DateTime.LocalNow(),-30)),10),"/","-") & "T00:00:00.000Z",
And calling this as a variable but because the string does not come with quotation marks it gives a syntax error when the variable is called in the 'Source = ' line.
Well, first you want
= Date.ToText(Date.From(Date.AddDays(DateTime.LocalNow(),-30)), [Format="yyyy-MM-dd"])& "T00:00:00.000Z"
since that returns 2022-09-28T00:00:00.000Z while yours returns 9-28-2022 T00:00:00.000Z which does not seem to be the original format
then try out this, which I cant test
let variable = Date.ToText(Date.From(Date.AddDays(DateTime.LocalNow(),-30)), [Format="yyyy-MM-dd"])& "T00:00:00.000Z",
Source = Json.Document(Web.Contents("https://api.crewhu.com/api" & "/v1/survey?query={""_updated_at"":{""$gte"":"""&variable&"""}}", [Headers=[X_CREWHU_APITOKEN="xxxxxxxxxxx"]]))
in Source
I checked several older questions regarding this topic like this one: Calendar Recurring/Repeating Events - Best Storage Method however, the answers are pretty bad performance-wise and cumbersome in implementation. From another answer, it's easy to tell why the accepted answer is a bad idea: a month of events takes 90 queries. Which is unacceptable.
Anyways, here's the issue I'm facing so that you don't have re-read those questions:
Storing events in such a way to allow them to recur. Think Google Calendar where you can specify patterns like "happens on the 1st of the month, every month" or "happens every 2nd monday of the month" (the latter is less important to me.
Querying a list of events for a time period. For example, I want to show someone a list of events for the next 2 months and I don't want to query for every single day of the month. Doing that would just kill the server (per user among thousands of rows of events)
DB agnostic. I use PgSQL and saw many answers for this question on other forums using either MS SQL-specific stuff or Oracle.
I'd appreciate any help! I read a couple of papers on the topic and still can't find something I can make work in SQL specifically.
The solution I have come up with is that I have an event table that has five fields defining the recurrence of the event, as defined below. I then also have a schedule table which I populate with the actual occurrence of the events. I do require an end date, and even when they specify something to go out to a couple years out, it is a monthly type event which does not create that many entries into the schedule table.
So, the event is stored in an event table, with a startDateTime and an endDateTime that describe the entire duration of the event if there is no recurrence. These two datetime fields also define the overall start and end of the event if it is a recurring event. In that same event table, we have the five fields defining recurrence, as laid out below.
The Schedule table stores individual occurrences of each event. So it has an eventId, startDateTime, and endDateTime. This start and end refer only to each occurrence, not the overall span.
For querying for all the scheduled occurrences happening in a period of time, I just query the schedule table checking for any occurrences that match this condition:
select * from schedule where schedule.startDateTime < #queryPeriodEnd and schedule.endDateTime > #queryPeriodStart
This query gives me only the schedule entries that happen partially or wholly within my query period. For getting the event data, it's a simple matter of joining to the event table.
The interesting part is calculating something like the second thursday of the month. That happens in the actual code for figuring out all the scheduled occurrences for a given event. I am also enclosing my code for that below.
EVENT RECURRENCE FIELDS
recurs
0=no recurrence
1=daily
2=weekly
3=monthly
recurs_interval
this is how many of the periods between recurrences. If the event recurs every 5 days, recurs_interval will have a 5 and recurs will have 1. If the event recurs every 3 weeks, recurs_interval will have a 3 and recurs will have a 2.
recurs_day
If the user selected monthly type recurrence, on a given day of the month (ex: 10th or the 14th). This has that date. The value is 0 if the user did not select monthly or specific day of month recurrence. The value is 1 to 31 otherwise.
recurs_ordinal
if the user selected a monthly type recurrence, but an ordinal type of day (ex: first monday, second thursday, last friday). This will have that ordinal number. The value is 0 if the user did not select this type of recurrence.
1=first
2=second
3=third
4=fourth
5=last
recurs_weekdays
for weekly and monthly-ordinal recurrence this stores the weekdays where the recurrence happens. 1=Sunday
2=Monday
4=Tuesday
8=Wednesday
16=Thursday
32=Friday
64=Saturday
So, every 4 weeks on Saturday and Sunday would be
recurs=2, recurs_interval=4, recurs_weekdays=65 (64 + 1)
Similarly, Every three months on the first Friday of the month would be
recurs=3, recurs_interval=3, recurs_ordinal=1, recurs_weekdays=32
CODE
thisEvent.occurrences = new List<ScheduleInstance>();
DateTime currentDateTime = (DateTime) thisEvent.start;
DateTime currentEndTime;
BitArray WeekDayRecurrenceBits = new BitArray(new Byte[] {(Byte) thisEvent.recursWeekdays});
while (currentDateTime < thisEvent.end)
{
currentEndTime = new DateTime(currentDateTime.Year, currentDateTime.Month, currentDateTime.Day,
thisEvent.end.Value.Hour, thisEvent.end.Value.Minute, thisEvent.end.Value.Second);
switch (thisEvent.recurs)
{
case (RecurrenceTypeEnum.None):
AddOccurrenceToRooms(thisEvent, currentDateTime, currentEndTime);
currentDateTime = (DateTime)thisEvent.end;
break;
case (RecurrenceTypeEnum.Daily):
AddOccurrenceToRooms(thisEvent, currentDateTime, currentEndTime);
currentDateTime = currentDateTime.AddDays(thisEvent.recursInterval);
break;
case (RecurrenceTypeEnum.Weekly):
int indexIntoCurrentWeek = (int) currentDateTime.DayOfWeek;
while ((indexIntoCurrentWeek < 7) && (currentDateTime < thisEvent.end))
{
if (WeekDayRecurrenceBits[(int) currentDateTime.DayOfWeek])
{
AddOccurrenceToRooms(thisEvent, currentDateTime, currentEndTime);
}
currentDateTime = currentDateTime.AddDays(1);
currentEndTime = currentEndTime.AddDays(1);
indexIntoCurrentWeek++;
}
currentDateTime = currentDateTime.AddDays(7 * (thisEvent.recursInterval - 1));
break;
case (RecurrenceTypeEnum.Monthly):
if (thisEvent.recursDay == 0)
{
DateTime FirstOfTheMonth = new DateTime(currentDateTime.Year, currentDateTime.Month, 1);
int daysToScheduleOccurrence = ((thisEvent.recursWeekdays - (int)FirstOfTheMonth.DayOfWeek + 7) % 7)
+ ((thisEvent.recursOrdinal - 1) * 7)
- currentDateTime.Day + 1;
if (daysToScheduleOccurrence >= 0)
{
currentDateTime = currentDateTime.AddDays(daysToScheduleOccurrence);
currentEndTime = currentEndTime.AddDays(daysToScheduleOccurrence);
if (currentDateTime < thisEvent.end)
{
AddOccurrenceToRooms(thisEvent, currentDateTime, currentEndTime);
}
}
}
else
{
if (currentDateTime.Day <= thisEvent.recursDay && thisEvent.recursDay <= DateTime.DaysInMonth(currentDateTime.Year, currentDateTime.Month) )
{
currentDateTime = currentDateTime.AddDays(thisEvent.recursDay - currentDateTime.Day);
currentEndTime = currentEndTime.AddDays(thisEvent.recursDay - currentEndTime.Day);
AddOccurrenceToRooms(thisEvent, currentDateTime, currentEndTime);
}
}
currentDateTime = currentDateTime.AddDays((currentDateTime.Day - 1) * -1).AddMonths(thisEvent.recursInterval);
break;
default:
break;
}
}
Hi there seems to be plenty out there to convert a US formatted date (MM/DD/YYYY) to a UK date (DD/MM/YYYY), but I'm trying to do the opposite: i receive a load of UK dates (DD-MM-YYYY) from the server which I'm trying to format as DD-MMM-YYYY (eg: 11 Jan 2013 ), but Flex thinks it's trying to convert American days and so when it gets 17-02-2013, it returns an empty string because there is no month 17.
How do i tell it I'm giving it UK dates and not US dates?
Thanks in advance.
Short answer, you can't.
Longer answer, there's not enough information to determine the date format. As you saw, in some cases you CAN determine that the date is not valid for the expected format (17-02-2013 - since 17 isn't a valid month, it must be DD-MM-YYYY rather than MM-DD-YYYY), but for just under half of the dates you just can't tell (is 01-02-2013 supposed to be Jan 2 or Feb 1?)
If you DO know that the dates are supposed to be in a particular format, you can use DateField.stringToDate to parse the string:
var value:Date = DateField.stringToDate(dateString, 'DD-MM-YYYY');
OK, got round it in the end with this ugly hack: ended up converting the string into an array and re-organising it so that it would fit the american format before using the DateFormatter.format on the result. There must be a more elegant way...
<Script>
public convertDateStringToUS( date : String ) : String
{
var dateArray : Array = date.split( "-" );
var day = dateArray[0];
var month = dateArray[1];
var year = dateArray[2];
date = month + "-" + day + "-" + year;
return date
}
</Script>
<declarations>
<mx:DateFormatter id="dateFormatter"
formatString="DD-MMM-YYYY" />
</declarations>
<s:Label id="myDateLabel"
text =" { dateFormatter.format( convertDateStringToUS( date ) ) } "/>
I'm trying to get a page to display a list of all the records that are valid at the current time, so comparing the start and end time & date to the time at that current moment. This is the code I have at the moment:
def self.time
find_by_sql("SELECT *
FROM screens s
WHERE (s.starttime < CONVERT(varchar(30), GETDATE(), 114)) AND (s.finishtime > CONVERT(varchar(30), GETDATE(), 114))")
end
However I get this: ActiveRecord::StatementInvalid
I know my code isn't right.. I just don't quite know how to fix it?
def self.time
find_by_sql("SELECT *
FROM screens s
WHERE (s.starttime < #{Time.now}) AND (s.finishtime > #{Time.now}")
end
In my job, I have inherited an Access 97 database. This database is very unstable and I need to remedy that in one way or another. I have been trying to go through and debug the current version so that I can migrate it to 2007. I have run across some code that the compiler doesn't like and not sure how to fix it...here is the code:
Function DaysInMonth(ByVal D As Date) As Long
' Requires a date argument because February can change
' if it's a leap year.
Select Case Month(D)
Case 2
If LeapYear(Year(D)) Then
DaysInMonth = 29
Else
DaysInMonth = 28
End If
Case 4, 6, 9, 11
DaysInMonth = 30
Case 1, 3, 5, 7, 8, 10, 12
DaysInMonth = 31
End Select
End Function
I get a compile error: Sub or Function not defined and it highlights the first "LeapYear".
Any help at all would be greatly appreciated! Thanks!
LeapYear is another function or procedure that appears not be present in your modules or has been made Private. LeapYear isn't a VBA function. There must have been a function that takes a year Year(D) and returns TRUE or FALSE if it's a leapyear. either insert one or set the existing one to Public
Edit:You could use IsLeapYear but change to 'LeapYear' and call using IsLeapYear(D)
The code in question is idiotic -- it was clearly written by somebody who didn't have a clue about VBA dates, which already know everything that is needed without needed to encode this crap into a CASE SELECT.
This expression will get you the number of days in a month:
Day(DateAdd("m", 1, DateValue(Month(Date()) & "/1/" & Year(Date()))) - 1)
What this does is get the first of the current month, adds a month to it (for the first of the next month), and then subtracts 1 from it. Since the integer part of the VBA date type is the day part, that will get you the last day of the current month. Then you take the result and pull the day out with the Day() function.
Coding that up as a function:
Function DaysInMonth(ByVal dteDate As Date) As Integer
Dim dteFirstOfMonth As Date
Dim dteLastOfMonth As Date
dteFirstOfMonth = DateValue(Month(dteDate) & "/1/" & Year(dteDate))
dteLastOfMonth = DateAdd("m", 1, dteFirstOfMonth) - 1
DaysInMonth = Day(dteLastOfMonth)
End Function
You could also code this up using the fact that the DateSerial() function treats the zeroth day as the last of the previous month:
Function DaysInMonth(ByVal dteDate As Date) As Integer
Dim dteOneMonthFromDate As Date
Dim dteLastOfThisMonth As Date
dteOneMonthFromDate = DateAdd("m", 1, dteDate)
dteLastOfThisMonth = DateSerial(Year(dteOneMonthFromDate), Month(dteOneMonthFromDate), 0)
DaysInMonth = Day(dteLastOfThisMonth)
End Function
But that doesn't make it any shorter...
None of this requires figuring out leap year rules -- those are built into the VBA date type.
And, of course, the function should not return a Long, but an Integer, since the maximum value it can ever return is 31.
LeapYear may not be your only issue.
In Access '97, go to the VBA editor and click "Tools/References":
Look in the references of your '97 project and see what DLLs are listed.
A screen will appear that shows you the ActiveX DLLs that can be used for the project. The ones that are checked are the ones currently used:
Odds are there is a DLL there that needs to be referenced in your new 2007 database.