我index.html.erb
看起来是这样的:
当用户按下“应用”按钮时,我想将表中的所有日期导出到 csv 文件中(并保存)。
我reports_controller.rb
在下一行中定义:
require 'csv'
我通过 ajax 将所有参数传递到控制器(到函数更新)。
现在:
start_day =用户选择的开始日期
.
.
.
end_year =用户选择的结束年份
在我的更新功能中,我尝试创建 csv 文件。为了在两个日期之间在我的表中进行搜索,我创建了两个变量:start_date 和 end_date。
start_date = YYYY-MM-DD(而:YYYY 是 start_year,MM 是 start_month,DD 是 start_day)。
end_date 类似于 start_date(但有:end_year、end_month 和 end_day)
所以这是我的更新功能:
def update
@start_day = params[:start_day]
@start_month = params[:start_month]
@start_year = params[:start_year]
@end_day = params[:end_day]
@end_month = params[:end_month]
@end_year = params[:end_year]
# the format of start_date and end_date will be: "YYYY-MM-DD"
@start_date = @start_year + "-" + @start_month + "-" + @start_day
@end_date = @end_year + "-" + @end_month + "-" + @end_day
# get all the transactions between start_date to end_date
@transactions = BillingTransaction.find(:all, :conditions =>["date(created_at) BETWEEN ? AND ? ", @start_date, @end_date])
# create the csv file
csv_string = CSV.generate do |csv|
# insert the headers
csv << ["transaction_type", "payment_method"]
# run all over the transactions
@transactions.each do |user|
# each of transactions is inserted into the csv file
csv << [BillingTransaction.transaction_type, BillingTransaction.payment_method]
end
end
# save it as 'BillingTransaction.csv'
send_data csv_string,
:type => 'text/csv; charset=iso-8859-1; header=present',
:disposition => "attachment; filename=BillingTransaction.csv"
end