我有一個模型,並增加了一些驗證Rails的模型驗證
這是我本來有:
validates :speed,
allow_blank: true,
numericality: { only_integer: true, greater_than: 0 }
,但我一直從我的CSV文件,說明導入項目時得到的錯誤,
速度必須是整數
然後我改變了它到:
validates :speed,
numericality: { only_integer: true, greater_than: 0 }, unless: "speed.nil?"
但我也在這裏得到相同的錯誤。
基本上我希望它能驗證速度是數字的,並且大於1,除非沒有速度傳入並允許空白值。
任何想法?
CSV進口商:
def self.import_from_csv(file)
Coaster.destroy_all
csv_file = CSV.parse(
File.read(
file.tempfile,
{encoding: 'UTF-8'}
),
headers: true,
header_converters: :symbol
)
csv_file.each do |row|
coaster_name = row[:name]
# No need to keep track of coasters already in the database as the CSV only lists each coaster once unlike parks
# create the new coaster
park = Park.find_by_name_and_location_1(row[:park], row[:location_1])
manufacturer = Manufacturer.find_by_name(row[:manufacturer])
coaster = Coaster.create!({
name: row[:name],
height: row[:height],
speed: row[:speed],
length: row[:length],
inversions: row[:inversions] == nil ? 0 : row[:inversions],
material: (row[:material].downcase if row[:material]),
lat: row[:coaster_lat],
lng: row[:coaster_lng],
park_id: park.id,
notes: row[:notes],
powered: row[:powered],
manufacturer_id: (manufacturer.id if manufacturer),
covering: row[:covering],
ride_style: row[:ride_style],
model: row[:model],
layout: row[:layout],
dates_ridden: row[:dates_ridden],
times_ridden: row[:times_ridden],
order: row[:order],
on_ride_photo: row[:on_ride_photo] == 1 ? true : false,
powered: row[:powered] == 1 ? true : false
})
ap "Created #{row[:name]} at #{row[:park]}"
end
end
你可以粘貼你的代碼,你用來導入CSV到數據庫。 –
已在原始文章中添加。我檢查了CSV,其中的項目沒有引號,所以我不明白爲什麼它會認爲它們是字符串? – rctneil
我將使用哪個驗證,第一個示例或第二個示例?如果值存在,我想驗證數字行,否則只允許空白。 – rctneil