【发布时间】：2018-06-04 16:04:12
【问题描述】：
我正在尝试使用 Elixir 计算 Stripe 中的按比例分配成本。 我正在使用 Stripity_Stripe 库 https://github.com/code-corps/stripity_stripe/tree/2.0-alpha
这就是我所做的。
- 获取当前时间为 unix 时间
proration_date = DateTime.to_unix(DateTime.utc_now)
- 使用 Stripe.Invoice 获取即将到来的发票
params = %{customer: customer_id, subscription: subscription_id, subscription_items: [%{plan: plan_id}], subscription_proration_date: proration_date} upcoming_invoice = Invoice.upcoming(params, opts)
我将 customer_id 替换为客户的 id，将 subscription_id 替换为客户的订阅 ID，将 plan_id 替换为新的 plan_id（要进行更改），将 subscription_proration_date 替换为 proration_date
它返回
{:ok,
%Stripe.Invoice{
amount_due: 17226,
application_fee: nil,
attempt_count: 0,
attempted: false,
charge: nil,
closed: false,
currency: "usd",
customer: "cus_CxY2gOrcBX568N",
date: 1530382817,
description: nil,
discount: nil,
ending_balance: nil,
forgiven: false,
id: nil,
lines: %Stripe.List{
data: [
%{
amount: 5235,
currency: "usd",
description: "Remaining time on Gold after 04 Jun 2018",
discountable: false,
id: "ii_1CZJOQE0U7CBdOnaJ2JiTU3p",
invoice_item: "ii_1CZJOQE0U7CBdOnaJ2JiTU3p",
livemode: false,
metadata: %{},
object: "line_item",
period: %{end: 1530382817, start: 1528121306},
plan: %Stripe.Plan{
amount: 6000,
created: 1527787728,
currency: "usd",
id: "plan_CxqGQzrlZKzsyX",
interval: "month",
interval_count: 1,
livemode: false,
metadata: %{},
name: "Gold",
object: "plan",
statement_descriptor: "Gold",
trial_period_days: nil
},
proration: true,
quantity: 1,
subscription: "sub_Cxr5eVusfDmwpD",
subscription_item: "si_CzHykruREBJmer",
type: "invoiceitem"
},
%{
amount: -1991,
currency: "usd",
description: "Unused time on Bronze after 31 May 2018",
discountable: false,
id: "ii_1CXyMGE0U7CBdOna7pMyz65c",
invoice_item: "ii_1CXyMGE0U7CBdOna7pMyz65c",
livemode: false,
metadata: %{},
object: "line_item",
period: %{end: 1530382817, start: 1527802256},
plan: %Stripe.Plan{
amount: 2000,
created: 1527789541,
currency: "usd",
id: "plan_CxqkbcqfX4hDB8",
interval: "month",
interval_count: 1,
livemode: false,
metadata: %{},
name: "Bronze",
object: "plan",
statement_descriptor: nil,
trial_period_days: nil
},
proration: true,
quantity: 1,
subscription: "sub_Cxr5eVusfDmwpD",
subscription_item: "si_Cxr5FLLMsPXBhq",
type: "invoiceitem"
},
%{
amount: 3982,
currency: "usd",
description: "Remaining time on Silver after 31 May 2018",
discountable: false,
id: "ii_1CXyMGE0U7CBdOnazohKmlP6",
invoice_item: "ii_1CXyMGE0U7CBdOnazohKmlP6",
livemode: false,
metadata: %{},
object: "line_item",
period: %{end: 1530382817, start: 1527802256},
plan: %Stripe.Plan{
amount: 4000,
created: 1527787680,
currency: "usd",
id: "plan_CxqFiVIY2FqTL3",
interval: "month",
interval_count: 1,
livemode: false,
metadata: %{},
name: "Silver",
object: "plan",
statement_descriptor: "Silver",
trial_period_days: nil
},
proration: true,
quantity: 1,
subscription: "sub_Cxr5eVusfDmwpD",
subscription_item: "si_Cxr5FLLMsPXBhq",
type: "invoiceitem"
},
%{
amount: 4000,
currency: "usd",
description: nil,
discountable: true,
id: "sub_Cxr5eVusfDmwpD",
livemode: false,
metadata: %{},
object: "line_item",
period: %{end: 1533061217, start: 1530382817},
plan: %Stripe.Plan{
amount: 4000,
created: 1527787680,
currency: "usd",
id: "plan_CxqFiVIY2FqTL3",
interval: "month",
interval_count: 1,
livemode: false,
metadata: %{},
name: "Silver",
object: "plan",
statement_descriptor: "Silver",
trial_period_days: nil
},
proration: false,
quantity: 1,
subscription: nil,
subscription_item: "si_Cxr5FLLMsPXBhq",
type: "subscription"
},
%{
amount: 6000,
currency: "usd",
description: nil,
discountable: true,
id: "sub_Cxr5eVusfDmwpD",
livemode: false,
metadata: %{},
object: "line_item",
period: %{end: 1533061217, start: 1530382817},
plan: %Stripe.Plan{
amount: 6000,
created: 1527787728,
currency: "usd",
id: "plan_CxqGQzrlZKzsyX",
interval: "month",
interval_count: 1,
livemode: false,
metadata: %{},
name: "Gold",
object: "plan",
statement_descriptor: "Gold",
trial_period_days: nil
},
proration: false,
quantity: 1,
subscription: nil,
subscription_item: "si_CzHykruREBJmer",
type: "subscription"
}
],
has_more: false,
object: "list",
total_count: 5,
url: "/v1/invoices/upcoming/lines?customer=cus_CxY2gOrcBX568N&subscription=sub_Cxr5eVusfDmwpD&subscription_proration_date=1528121306"
},
livemode: false,
metadata: %{},
next_payment_attempt: 1530386417,
object: "invoice",
paid: false,
period_end: 1530382817,
period_start: 1527790817,
receipt_number: nil,
starting_balance: 0,
statement_descriptor: nil,
subscription: "sub_Cxr5eVusfDmwpD",
subscription_proration_date: 1528121306,
subtotal: 17226,
tax: nil,
tax_percent: nil,
total: 17226,
webhooks_delivered_at: nil
}}
- 所以我做了一个模式匹配来获得这样的数据项(https://stripe.com/docs/billing/subscriptions/prorations)
{:ok, %Stripe.Invoice{lines: %Stripe.List{data: data}}} = 即将到来的发票
-
然后我尝试了这个
数据 |> Enum.find(& &1.period.start == proration_date)
它返回这个
%{ amount: 5235, currency: "usd", description: "Remaining time on Gold after 04 Jun 2018", discountable: false, id: "ii_1CZJPIE0U7CBdOna36eKJQfg", invoice_item: "ii_1CZJPIE0U7CBdOna36eKJQfg", livemode: false, metadata: %{}, object: "line_item", period: %{end: 1530382817, start: 1528121306}, plan: %Stripe.Plan{ amount: 6000, created: 1527787728, currency: "usd", id: "plan_CxqGQzrlZKzsyX", interval: "month", interval_count: 1, livemode: false, metadata: %{}, name: "Gold", object: "plan", statement_descriptor: "Gold", trial_period_days: nil }, proration: true, quantity: 1, subscription: "sub_Cxr5eVusfDmwpD", subscription_item: "si_CzHzbTUPBrfqPA", type: "invoiceitem" }
那我不知道下一步该怎么做。 在使用 python 的条带文档中，这样做。
current_prorations = [ii for ii in invoice.lines.data if ii.period.start == proration_date]
cost = sum([p.amount for p in current_prorations])
但我的代码只返回 1 个结果，我升级了计划以检查我的代码是否返回正确的成本，但它不正确。
我错过了什么？
【问题讨论】：
-
如果将
Enum.find更改为Enum.filter会怎样？我认为您想要所有满足该标准的元素？ -
谢谢，这样会更好，但我的问题是，如何正确计算按比例分配的成本。