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bdfr-browser/lib/bdfr_browser/post.ex

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Elixir
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defmodule BdfrBrowser.Post do
use Ecto.Schema
import Ecto.Query, only: [from: 2]
alias BdfrBrowser.{Comment, Subreddit}
@primary_key {:id, :string, autogenerate: false}
schema "posts" do
field :title, :string
field :selftext, :string
field :url, :string
field :permalink, :string
field :author, :string
field :upvote_ratio, :float
field :posted_at, :utc_datetime
field :filename, :string
belongs_to :subreddit, Subreddit
has_many :comments, Comment
end
def date_listing(subreddit) do
from(p in __MODULE__,
select: fragment("to_char(?, 'YYYY-MM')", p.posted_at),
where: p.subreddit_id == ^subreddit.id,
distinct: true,
order_by: [desc: fragment("to_char(?, 'YYYY-MM')", p.posted_at)]
)
end
def during_month(subreddit, month_str) do
{:ok, d} = Date.from_iso8601("#{month_str}-01")
during_range(subreddit, Date.beginning_of_month(d), Date.end_of_month(d))
end
def during_range(subreddit, start_date, end_date) do
from(p in __MODULE__,
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join: c in assoc(p, :comments),
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select: %{id: p.id, title: p.title, author: p.author, posted_at: p.posted_at, num_comments: count(c.id)},
where:
p.subreddit_id == ^subreddit.id and type(p.posted_at, :date) >= ^start_date and
type(p.posted_at, :date) <= ^end_date,
order_by: [desc: p.posted_at],
group_by: p.id
)
end
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def get_full(id) do
from(p in __MODULE__,
where: p.id == ^id,
preload: [
comments:
^from(c in Comment,
where: is_nil(c.parent_id),
order_by: [asc: c.posted_at],
preload: [children: ^from(c1 in Comment, order_by: [asc: c1.posted_at])]
)
]
)
end
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def by_author(author) do
from(p in __MODULE__,
join: c in assoc(p, :comments),
join: s in assoc(p, :subreddit),
select: %{
id: p.id,
title: p.title,
posted_at: p.posted_at,
num_comments: count(c.id),
subreddit: s.name,
date: fragment("to_char(?, 'YYYY-MM')", p.posted_at)
},
where: p.author == ^author,
order_by: [desc: p.posted_at],
group_by: [p.id, s.name]
)
end
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end