Year query returns no results
I have a Holiday model, with a holiday_date attribute of DateTime.
I added a new Holiday (New Years Day) with a date of 1/1/2019.
When I do in the console Holiday.last, I see this:
#<Holiday id: 50, name: "New Years Day", holiday_date: "2018-12-31 23:00:00", created_at: "2018-11-13 13:15:54", updated_at: "2018-11-13 13:15:54">
So it is saved in UTC time, a day earlier. When I then do Holiday.last.holiday_date I get this:
Tue, 01 Jan 2019 00:00:00 CET +01:00
Great, the date is converted to our CET date and time. But when I query for a year like this:
Holiday.where("extract(year from holiday_date) = '2019'")
It returns no results. So it seems that there is no conversion to CET time with this query. How can I make sure that the query returns the holiday I added?
ruby-on-rails
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
add a comment |
I have a Holiday model, with a holiday_date attribute of DateTime.
I added a new Holiday (New Years Day) with a date of 1/1/2019.
When I do in the console Holiday.last, I see this:
#<Holiday id: 50, name: "New Years Day", holiday_date: "2018-12-31 23:00:00", created_at: "2018-11-13 13:15:54", updated_at: "2018-11-13 13:15:54">
So it is saved in UTC time, a day earlier. When I then do Holiday.last.holiday_date I get this:
Tue, 01 Jan 2019 00:00:00 CET +01:00
Great, the date is converted to our CET date and time. But when I query for a year like this:
Holiday.where("extract(year from holiday_date) = '2019'")
It returns no results. So it seems that there is no conversion to CET time with this query. How can I make sure that the query returns the holiday I added?
ruby-on-rails
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
add a comment |
I have a Holiday model, with a holiday_date attribute of DateTime.
I added a new Holiday (New Years Day) with a date of 1/1/2019.
When I do in the console Holiday.last, I see this:
#<Holiday id: 50, name: "New Years Day", holiday_date: "2018-12-31 23:00:00", created_at: "2018-11-13 13:15:54", updated_at: "2018-11-13 13:15:54">
So it is saved in UTC time, a day earlier. When I then do Holiday.last.holiday_date I get this:
Tue, 01 Jan 2019 00:00:00 CET +01:00
Great, the date is converted to our CET date and time. But when I query for a year like this:
Holiday.where("extract(year from holiday_date) = '2019'")
It returns no results. So it seems that there is no conversion to CET time with this query. How can I make sure that the query returns the holiday I added?
ruby-on-rails
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
I have a Holiday model, with a holiday_date attribute of DateTime.
I added a new Holiday (New Years Day) with a date of 1/1/2019.
When I do in the console Holiday.last, I see this:
#<Holiday id: 50, name: "New Years Day", holiday_date: "2018-12-31 23:00:00", created_at: "2018-11-13 13:15:54", updated_at: "2018-11-13 13:15:54">
So it is saved in UTC time, a day earlier. When I then do Holiday.last.holiday_date I get this:
Tue, 01 Jan 2019 00:00:00 CET +01:00
Great, the date is converted to our CET date and time. But when I query for a year like this:
Holiday.where("extract(year from holiday_date) = '2019'")
It returns no results. So it seems that there is no conversion to CET time with this query. How can I make sure that the query returns the holiday I added?
ruby-on-rails
ruby-on-rails
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
asked Nov 13 '18 at 13:37
JohnJohn
2,31783775
2,31783775
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
You'll have to cast timezones twice:
Holiday.where(
"extract(year from holiday_date AT TIME ZONE 'UTC' AT TIME ZONE 'CET') = '2019'"
)
This will work, but it would be nice to use indices for your query, we'll just have to prepare it better:
year = Time.zone.parse("2019-01-01")
Holiday.where("holiday_date BETWEEN ? AND ?", year.beginning_of_year, year.end_of_year)
# SELECT "holidays".* FROM "holidays" WHERE (holiday_date BETWEEN '2018-12-31 23:00:00' AND '2019-12-31 22:59:59.999999')
I would really think whether you need datetimes for your holiday_date column, perhaps dates would be enough, so that you don't have to deal with timezones.
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
Thanks! Your last remark is correct, it should have been a date.
– John
Nov 14 '18 at 5:57
add a comment |
You can query by timezone like this
Holiday.where("extract(year from holiday_date AT TIME ZONE 'CET') = '2019'")
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You'll have to cast timezones twice:
Holiday.where(
"extract(year from holiday_date AT TIME ZONE 'UTC' AT TIME ZONE 'CET') = '2019'"
)
This will work, but it would be nice to use indices for your query, we'll just have to prepare it better:
year = Time.zone.parse("2019-01-01")
Holiday.where("holiday_date BETWEEN ? AND ?", year.beginning_of_year, year.end_of_year)
# SELECT "holidays".* FROM "holidays" WHERE (holiday_date BETWEEN '2018-12-31 23:00:00' AND '2019-12-31 22:59:59.999999')
I would really think whether you need datetimes for your holiday_date column, perhaps dates would be enough, so that you don't have to deal with timezones.
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
Thanks! Your last remark is correct, it should have been a date.
– John
Nov 14 '18 at 5:57
add a comment |
You'll have to cast timezones twice:
Holiday.where(
"extract(year from holiday_date AT TIME ZONE 'UTC' AT TIME ZONE 'CET') = '2019'"
)
This will work, but it would be nice to use indices for your query, we'll just have to prepare it better:
year = Time.zone.parse("2019-01-01")
Holiday.where("holiday_date BETWEEN ? AND ?", year.beginning_of_year, year.end_of_year)
# SELECT "holidays".* FROM "holidays" WHERE (holiday_date BETWEEN '2018-12-31 23:00:00' AND '2019-12-31 22:59:59.999999')
I would really think whether you need datetimes for your holiday_date column, perhaps dates would be enough, so that you don't have to deal with timezones.
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
Thanks! Your last remark is correct, it should have been a date.
– John
Nov 14 '18 at 5:57
add a comment |
You'll have to cast timezones twice:
Holiday.where(
"extract(year from holiday_date AT TIME ZONE 'UTC' AT TIME ZONE 'CET') = '2019'"
)
This will work, but it would be nice to use indices for your query, we'll just have to prepare it better:
year = Time.zone.parse("2019-01-01")
Holiday.where("holiday_date BETWEEN ? AND ?", year.beginning_of_year, year.end_of_year)
# SELECT "holidays".* FROM "holidays" WHERE (holiday_date BETWEEN '2018-12-31 23:00:00' AND '2019-12-31 22:59:59.999999')
I would really think whether you need datetimes for your holiday_date column, perhaps dates would be enough, so that you don't have to deal with timezones.
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
You'll have to cast timezones twice:
Holiday.where(
"extract(year from holiday_date AT TIME ZONE 'UTC' AT TIME ZONE 'CET') = '2019'"
)
This will work, but it would be nice to use indices for your query, we'll just have to prepare it better:
year = Time.zone.parse("2019-01-01")
Holiday.where("holiday_date BETWEEN ? AND ?", year.beginning_of_year, year.end_of_year)
# SELECT "holidays".* FROM "holidays" WHERE (holiday_date BETWEEN '2018-12-31 23:00:00' AND '2019-12-31 22:59:59.999999')
I would really think whether you need datetimes for your holiday_date column, perhaps dates would be enough, so that you don't have to deal with timezones.
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
edited Nov 13 '18 at 15:29
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
answered Nov 13 '18 at 14:05
Marcin KołodziejMarcin Kołodziej
4,2961315
4,2961315
Thanks! Your last remark is correct, it should have been a date.
– John
Nov 14 '18 at 5:57
add a comment |
Thanks! Your last remark is correct, it should have been a date.
– John
Nov 14 '18 at 5:57
Thanks! Your last remark is correct, it should have been a date.
– John
Nov 14 '18 at 5:57
Thanks! Your last remark is correct, it should have been a date.
– John
Nov 14 '18 at 5:57
add a comment |
You can query by timezone like this
Holiday.where("extract(year from holiday_date AT TIME ZONE 'CET') = '2019'")
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
add a comment |
You can query by timezone like this
Holiday.where("extract(year from holiday_date AT TIME ZONE 'CET') = '2019'")
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
add a comment |
You can query by timezone like this
Holiday.where("extract(year from holiday_date AT TIME ZONE 'CET') = '2019'")
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
You can query by timezone like this
Holiday.where("extract(year from holiday_date AT TIME ZONE 'CET') = '2019'")
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
answered Nov 13 '18 at 14:01
Vijay AtminVijay Atmin
16410
16410
add a comment |
add a comment |
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