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# Step 1 | |
def create_subscription(email, plan_id, payment_method_id) do | |
with %User{customer_id: nil, name: name} = user <- | |
Repo.get_by(User, email: email), | |
{:ok, %Stripe.Customer{id: customer_id}} <- | |
Stripe.Customer.create(%{ | |
name: name, | |
email: email, | |
payment_method: payment_method_id, |
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# Preloading usually required an extra query. | |
# To do it in one query, a `join` is needed, and the call to `preload` needs to know the name of join | |
# This macro does both the `join` and `preload` together | |
defmodule Preloader do | |
import Ecto, only: [assoc: 2] | |
alias Ecto.Query.Builder.{Join, Preload} | |
defmacro preload_join(query, association) do | |
expr = quote do: assoc(l, unquote(association)) | |
binding = quote do: [l] |
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defmodule Test do | |
def thing() do | |
1+1 | |
end | |
defmacro my_macro do | |
quote do | |
1 + 1 | |
end | |
end |
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#!/bin/bash | |
# installing erlang on ubuntu's | |
VERSION="R15B01" | |
sudo apt-get install build-essential libncurses5-dev openssl libssl-dev | |
sudo mkdir -p /opt/erlang/ | |
curl -O https://raw.github.com/spawngrid/kerl/master/kerl && chmod a+x kerl | |
sudo mv kerl /opt/erlang/ |