Ruby on rails 通过解析DateTime rails，使用3个函数在处创建筛选器
目前，我正在通过查询从数据库中获取值Ruby on rails 通过解析DateTime rails，使用3个函数在处创建筛选器,ruby-on-rails,ruby,Ruby On Rails,Ruby,目前，我正在通过查询从数据库中获取值 created_ats = Snapshot.connection.select_all("SELECT created_at from snapshots WHERE snapshot_id >= '#{camera_id}_#{from_date}' AND snapshot_id <= '#{camera_id}_#{to_date}'") 这只是一个例子，天数和时间可以完全填满，也可以部分填满 有一个名为INTERVAL的字段。这被视为
created_ats = Snapshot.connection.select_all("SELECT created_at from snapshots WHERE snapshot_id >= '#{camera_id}_#{from_date}' AND snapshot_id <= '#{camera_id}_#{to_date}'")
INTERVALtimestamps，并在上面的信息中提供日期和时间将X（间隔）添加到在创建的时间
例如，在天和时间之间进行精炼。我们将有一个创建的at列表，因此从第一个创建的at开始，我们将在创建的at中添加x.minutes，并确保（创建的at+x.minutes）也存在于创建的at中（我们经过几天和几个小时的优化后得到），是的，然后保存，否则保留
到目前为止，我试过的是这个，它并没有像我希望的那样工作，根据我的说法，它似乎没有错误，但仍然没有给我具体的值
class SnapshotExtractor < ActiveRecord::Base
establish_connection "evercam_db_#{Rails.env}".to_sym
belongs_to :camera
require "rmega"
require "aws-sdk-v1"
require 'open-uri'
def self.connect_mega
storage = Rmega.login("#{ENV['MEGA_EMAIL']}", "#{ENV['MEGA_PASSWORD']}")
storage
end
def self.connect_bucket
access_key_id = "#{ENV['AWS_ACCESS_KEY']}"
secret_access_key = "#{ENV['AWS_SECRET_KEY']}"
s3 = AWS::S3.new(
access_key_id: access_key_id,
secret_access_key: secret_access_key,
)
bucket = s3.buckets["evercam-camera-assets"]
bucket
end
# def self.test
# snapshot_bucket = connect_bucket
# storage = connect_mega
# folder = storage.root.create_folder("dongi")
# s3_object = snapshot_bucket.objects["gpo-cam/snapshots/1452136326.jpg"]
# snap_url = s3_object.url_for(:get, {expires: 1.years.from_now, secure: true}).to_s
# File.open("formula.txt", 'w') { |file| file.write(snap_url) }
# open('image.jpg', 'wb') do |file|
# file << open(snap_url).read
# end
# folder.upload("image.jpg")
# end
def self.extract_snapshots
running = SnapshotExtractor.where(status: 1).any?
unless running
@snapshot_request = SnapshotExtractor.where(status: 0).first
@snapshot_request.update_attribute(:status, 1)
camera_id = @snapshot_request.camera_id
exid = Camera.find(camera_id).exid
mega_id = @snapshot_request.id
from_date = @snapshot_request.from_date.strftime("%Y%m%d")
to_date = @snapshot_request.to_date.strftime("%Y%m%d")
interval = @snapshot_request.interval
@days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
set_days = []
set_timings = []
index = 0
@days.each do |day|
if @snapshot_request.schedule[day].present?
set_days[index] = day
set_timings[index] = @snapshot_request.schedule[day]
index += 1
end
end
begin
created_ats = Snapshot.connection.select_all("SELECT created_at from snapshots WHERE snapshot_id >= '#{camera_id}_#{from_date}' AND snapshot_id <= '#{camera_id}_#{to_date}'")
created_at_spdays = refine_days(created_ats, set_days)
created_at_sptime = refine_times(created_at_spdays, set_timings, set_days)
created_at = refine_intervals(created_at_sptime, interval)
File.open("test.txt", 'w') { |file| file.write(created_at) }
storage = connect_mega
creatp = storage.root.create_folder("created_at")
creatp.upload("test.txt")
rescue => error
notify_airbrake(error)
end
begin
storage = connect_mega
snapshot_bucket = connect_bucket
new_folder = storage.root.create_folder("#{exid}")
folder = storage.nodes.find do |node|
node.type == :folder and node.name == "#{exid}"
end
folder.create_folder("#{mega_id}")
created_at.each do |snap|
snap_i = DateTime.parse(snap).to_i
s3_object = snapshot_bucket.objects["#{exid}/snapshots/#{snap_i}.jpg"]
if s3_object.exists?
snap_url = s3_object.url_for(:get, {expires: 1.years.from_now, secure: true}).to_s
File.open("formula_#{snap_i}.txt", 'w') { |file| file.write(snap_url) }
open('#{snap_i}.jpg', 'wb') do |file|
file << open(snap_url).read
end
folder.upload('#{snap_i}.jpg')
end
end
@snapshot_request.update_attribute(:status, 3)
rescue => error
error
end
end
# created_at
end
private
def self.refine_days(created_ats, days)
created_at = []
index = 0
created_ats.each do |single|
days.each do |day|
if day == Date.parse(single["created_at"]).strftime("%A")
created_at[index] = single["created_at"]
index += 1
end
end
end
created_at
end
def self.refine_times(created_ats, timings, days)
created_at = []
index = 0
day_index = 0
days_times = days.zip(timings.flatten)
one = 1
zero = 0
created_ats.each do |single|
days_times.each do |day_time|
if Date.parse(single).strftime("%A") == day_time[day_index]
start_time = DateTime.parse(day_time[one].split("-")[zero]).strftime("%H:%M")
end_time = DateTime.parse(day_time[one].split("-")[one]).strftime("%H:%M")
created_at_time = DateTime.parse(single).strftime("%H:%M")
if created_at_time >= start_time && created_at_time <= end_time
created_at[index] = single
index += 1
end
end
end
end
created_at
end
def self.refine_intervals(created_ats, interval)
created_at = [created_ats.first]
last_created_at = DateTime.parse(created_ats.last)
index = 1
index_for_dt = 0
length = created_ats.length
(1..length).each do |single|
if (DateTime.parse(created_at[index_for_dt]) + interval.minutes) <= last_created_at
temp = DateTime.parse(created_at[index_for_dt]) + interval.minutes
created_at[index] = temp.to_s
index_for_dt += 1
index += 1
end
end
created_at
end
end
类快照提取器snapshot\u id>=？
，然后将{camera\u id}{from\u date}}
添加到函数调用中。还有一点值得注意的是，“#{x}”
几乎总是毫无意义的，应该是x
，而您在代码中广泛使用这种反模式，没有明显的原因。例如，您应该说：Rmega.login（ENV['MEGA\u EMAIL']，ENV['MEGA\u PASSWORD']）
。如果您需要转换为字符串，x.to_s
是最标准的转换方法，它可以清楚地表明您的意图。很抱歉，这里太乱了，请告诉我您的答案好吗？您的问题不太清楚，所以，我只是提供了建议来清理它，也许更多的是它的核心。问题是你可以离开Env，而查询只考虑时间戳-> CytDeTyAt，然后通过时间和时间过滤它。同时添加intervel，因为您绕过了Rails中可用的SQL转义方法，这是非常糟糕的。您应该使用占位符值，如snapshot\u id>=？
，然后将{camera\u id}{from\u date}}
添加到函数调用中。还有一点值得注意的是，“#{x}”
几乎总是毫无意义的，应该是x
，而您在代码中广泛使用这种反模式，没有明显的原因。例如
class SnapshotExtractor < ActiveRecord::Base
establish_connection "evercam_db_#{Rails.env}".to_sym
belongs_to :camera
require "rmega"
require "aws-sdk-v1"
require 'open-uri'
def self.connect_mega
storage = Rmega.login("#{ENV['MEGA_EMAIL']}", "#{ENV['MEGA_PASSWORD']}")
storage
end
def self.connect_bucket
access_key_id = "#{ENV['AWS_ACCESS_KEY']}"
secret_access_key = "#{ENV['AWS_SECRET_KEY']}"
s3 = AWS::S3.new(
access_key_id: access_key_id,
secret_access_key: secret_access_key,
)
bucket = s3.buckets["evercam-camera-assets"]
bucket
end
# def self.test
# snapshot_bucket = connect_bucket
# storage = connect_mega
# folder = storage.root.create_folder("dongi")
# s3_object = snapshot_bucket.objects["gpo-cam/snapshots/1452136326.jpg"]
# snap_url = s3_object.url_for(:get, {expires: 1.years.from_now, secure: true}).to_s
# File.open("formula.txt", 'w') { |file| file.write(snap_url) }
# open('image.jpg', 'wb') do |file|
# file << open(snap_url).read
# end
# folder.upload("image.jpg")
# end
def self.extract_snapshots
running = SnapshotExtractor.where(status: 1).any?
unless running
@snapshot_request = SnapshotExtractor.where(status: 0).first
@snapshot_request.update_attribute(:status, 1)
camera_id = @snapshot_request.camera_id
exid = Camera.find(camera_id).exid
mega_id = @snapshot_request.id
from_date = @snapshot_request.from_date.strftime("%Y%m%d")
to_date = @snapshot_request.to_date.strftime("%Y%m%d")
interval = @snapshot_request.interval
@days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
set_days = []
set_timings = []
index = 0
@days.each do |day|
if @snapshot_request.schedule[day].present?
set_days[index] = day
set_timings[index] = @snapshot_request.schedule[day]
index += 1
end
end
begin
created_ats = Snapshot.connection.select_all("SELECT created_at from snapshots WHERE snapshot_id >= '#{camera_id}_#{from_date}' AND snapshot_id <= '#{camera_id}_#{to_date}'")
created_at_spdays = refine_days(created_ats, set_days)
created_at_sptime = refine_times(created_at_spdays, set_timings, set_days)
created_at = refine_intervals(created_at_sptime, interval)
File.open("test.txt", 'w') { |file| file.write(created_at) }
storage = connect_mega
creatp = storage.root.create_folder("created_at")
creatp.upload("test.txt")
rescue => error
notify_airbrake(error)
end
begin
storage = connect_mega
snapshot_bucket = connect_bucket
new_folder = storage.root.create_folder("#{exid}")
folder = storage.nodes.find do |node|
node.type == :folder and node.name == "#{exid}"
end
folder.create_folder("#{mega_id}")
created_at.each do |snap|
snap_i = DateTime.parse(snap).to_i
s3_object = snapshot_bucket.objects["#{exid}/snapshots/#{snap_i}.jpg"]
if s3_object.exists?
snap_url = s3_object.url_for(:get, {expires: 1.years.from_now, secure: true}).to_s
File.open("formula_#{snap_i}.txt", 'w') { |file| file.write(snap_url) }
open('#{snap_i}.jpg', 'wb') do |file|
file << open(snap_url).read
end
folder.upload('#{snap_i}.jpg')
end
end
@snapshot_request.update_attribute(:status, 3)
rescue => error
error
end
end
# created_at
end
private
def self.refine_days(created_ats, days)
created_at = []
index = 0
created_ats.each do |single|
days.each do |day|
if day == Date.parse(single["created_at"]).strftime("%A")
created_at[index] = single["created_at"]
index += 1
end
end
end
created_at
end
def self.refine_times(created_ats, timings, days)
created_at = []
index = 0
day_index = 0
days_times = days.zip(timings.flatten)
one = 1
zero = 0
created_ats.each do |single|
days_times.each do |day_time|
if Date.parse(single).strftime("%A") == day_time[day_index]
start_time = DateTime.parse(day_time[one].split("-")[zero]).strftime("%H:%M")
end_time = DateTime.parse(day_time[one].split("-")[one]).strftime("%H:%M")
created_at_time = DateTime.parse(single).strftime("%H:%M")
if created_at_time >= start_time && created_at_time <= end_time
created_at[index] = single
index += 1
end
end
end
end
created_at
end
def self.refine_intervals(created_ats, interval)
created_at = [created_ats.first]
last_created_at = DateTime.parse(created_ats.last)
index = 1
index_for_dt = 0
length = created_ats.length
(1..length).each do |single|
if (DateTime.parse(created_at[index_for_dt]) + interval.minutes) <= last_created_at
temp = DateTime.parse(created_at[index_for_dt]) + interval.minutes
created_at[index] = temp.to_s
index_for_dt += 1
index += 1
end
end
created_at
end
end