您好我正在开发一个rails项目，我最近更新了我项目的开发数据库。我有sqlite，现在我有Postgres。
我的产品型号有这个方法：
def self.update_products!
ec_products = ElemetalCapital::Product.all
transaction do
ec_products.each do |ec_product|
product = ElemetalCapitalProduct.where(id: ec_product.id).first_or_initialize
product.spot_id = ec_product.spot
product.goldtrex_markup ||= 1 # default to a 1% markup
product.description = ec_product.description
product.metal = ec_product.metal
product.weight = ec_product.weight
product.elemetal_capital_premium = ec_product.premiumBuy
product.save!
end
end
end
在Postgres更新之前，该方法正常运行。 但是，在更新后我收到此错误，我该如何解决该问题：
[2] pry(main)> Product.update_products!
(0.5ms) BEGIN
ElemetalCapitalProduct Load (0.5ms) SELECT "products".* FROM "products" WHERE "products"."type" IN ('ElemetalCapitalProduct') AND "products"."id" = $1 ORDER BY "products"."id" ASC LIMIT 1 [["id", "GKILO-OPM"]]
(0.4ms) ROLLBACK
ActiveResource::ResourceNotFound: Failed. Response code = 404. Response message = Not Found.
from /Users/enriquesalceda/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/activeresource-4.0.0/lib/active_resource/connection.rb:144:in `handle_response'
"products"."id" = $1上有一些非常奇怪的东西，它不应该是1美元。
此应用程序使用供应商elemetal资本的API，提供有关其产品和价格的信息，然后经过一些计算后我们更新shopify数据库。 仅供记录：
这是我的整个产品型号：
class Product < ActiveRecord::Base
self.primary_key = :id
monetize :elemetal_capital_premium_cents, allow_nil: true
belongs_to :spot
def to_hash
instance_variables.each_with_object({}) do |var, hash|
hash[var.to_s.delete("@")] = instance_variable_get(var)
end
end
def metal_name
case metal
when "Ag" then "Silver"
when "Au" then "Gold"
when "Pd" then "Palladium"
when "Pt" then "Platinum"
end
end
def price
# return 1300 if spot.nil?
spot_price = spot.ask
ec_price = spot_price + elemetal_capital_premium
total_price = ec_price * weight
gt_price = total_price + (goldtrex_markup / 100 * total_price)
gt_price.exchange_to(:AUD)
end
def shopify_variant_data
{
barcode: id,
price: price.to_s,
weight: weight,
weight_unit: "oz",
grams: weight * 31.1034768
}
end
before_create :shopify_create
def shopify_create
data = {
title: "#{metal_name} - #{description}",
variants: [
shopify_variant_data
]
}
sp = ShopifyAPI::Product.create(data)
self.shopify_id = sp.id
end
before_update :shopify_update
def shopify_update
sp = ShopifyAPI::Product.find(shopify_id)
variant = sp.variants.first
shopify_variant_data.each do |k, v|
instance_variable_set("@#{k.to_s}".to_sym, v)
end
variant.save!
end
def self.update_products!
ec_products = ElemetalCapital::Product.all
transaction do
ec_products.each do |ec_product|
product = ElemetalCapitalProduct.where(id: ec_product.id).first_or_initialize
product.spot_id = ec_product.spot
product.goldtrex_markup ||= # default to a 1% markup
product.description = ec_product.description
product.metal = ec_product.metal
product.weight = ec_product.weight
product.elemetal_capital_premium = ec_product.premiumBuy
product.save!
end
end
end
end
这是架构：
ActiveRecord::Schema.define(version: 20150609085027) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
create_table "deliveries", force: :cascade do |t|
t.string "receiver"
t.datetime "delivery_day"
t.string "tracking_number"
t.text "delivery_notes"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "ticket_id"
end
create_table "elemetal_capital_trades", force: :cascade do |t|
t.string "location"
t.string "currency"
t.string "side"
t.string "elemetal_capital_product_id"
t.integer "quantity"
t.string "elemetal_capital_trade_id"
t.float "price_per_unit"
t.float "weight"
t.float "price_per_weight"
t.float "price_total"
t.string "time_stamp_origin"
t.string "metal"
t.float "spot"
t.integer "line_item_id"
end
add_index "elemetal_capital_trades", ["line_item_id"], name: "index_elemetal_capital_trades_on_line_item_id", using: :btree
create_table "employees", force: :cascade do |t|
t.string "first_name"
t.string "last_name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "items", force: :cascade do |t|
t.integer "quantity"
t.string "item_description"
t.float "unit_price"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "ticket_id"
end
create_table "line_items", force: :cascade do |t|
t.integer "quantity"
t.integer "shopify_line_item_id"
t.integer "order_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "shopify_product_id", limit: 8
end
add_index "line_items", ["order_id"], name: "index_line_items_on_order_id", using: :btree
create_table "orders", force: :cascade do |t|
t.integer "order_number"
t.integer "shopify_order_id"
t.integer "total"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "payments", force: :cascade do |t|
t.datetime "value_date"
t.integer "reference_number"
t.float "contract_rate", default: 0.0
t.string "trade_notes"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "ticket_id"
t.float "usd_payment", default: 0.0
end
create_table "products", id: false, force: :cascade do |t|
t.string "id", null: false
t.string "type", null: false
t.text "description", null: false
t.decimal "weight", null: false
t.string "metal", null: false
t.string "spot_id", null: false
t.integer "elemetal_capital_premium_cents"
t.decimal "goldtrex_markup", null: false
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "shopify_id", limit: 8, null: false
end
add_index "products", ["shopify_id"], name: "index_products_on_shopify_id", unique: true, using: :btree
add_index "products", ["spot_id"], name: "index_products_on_spot_id", using: :btree
create_table "spots", id: false, force: :cascade do |t|
t.string "id", null: false
t.integer "bid_cents", null: false
t.integer "ask_cents", null: false
end
create_table "tickets", force: :cascade do |t|
t.integer "goldtrex_employee"
t.string "ticket_number"
t.datetime "elemetal_capital_order_date"
t.string "trader"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.boolean "au"
t.float "au_spot_price"
t.boolean "ag"
t.float "ag_spot_price"
t.boolean "deposit"
t.float "deposit_amount"
end
end
答案 0 :(得分：0)
Rails使用ORM，它将使用DB的所有逻辑隐藏在漂亮的方法中。基本上这意味着如果您更改数据库 - 什么都不会发生，应用程序将继续按预期工作（应该提及，此声明在任何情况下都不适用，因为数据库不同，但在这种情况下不适用）。如果你得到404 - 这意味着数据库中缺少项目，没有错。
当您说您将数据库从sqlite更改为Postgres时 - 您是否迁移了数据？尝试从控制台运行ElemetalCapitalProduct.count以确保它有任何内容。如果是，请比较您在sqlite中获得的数据和您在Postgres中收到的数据。