romannurik

# Add this to your .git/config file

[diff]
  tool = SketchKaleidoscope
[difftool "SketchKaleidoscope"]
  cmd = ./util-sketch-kaleidoscope-diff.bash \"$MERGED\" \"$LOCAL\" \"$REMOTE\"

wosephjeber

Renaming table in Ecto migration

I recently wanted to rename a model and its postgres table in a Phoenix app. Renaming the table was simple and documented, but the table also had constraints, sequences, and indexes that needed to be updated in order for the Ecto model to be able to rely on default naming conventions. I couldn't find any examples of what this would look like but was eventually able to figure it out. For anyone else in the same situation, hopefully this example helps.

In the example below, I'm renaming the Permission model to Membership. This model belongs to a User and an Account, so it has foreign key constraints that need to be renamed.

defmodule MyApp.Repo.Migrations.RenamePermissionsToMemberships do
  use Ecto.Migration

joshchernoff

defmodule MyAppWeb.InputHelper do
  use Phoenix.HTML

  def input(form, field, opts \\ []) do
    type = Phoenix.HTML.Form.input_type(form, field)

    wrapper_classes = Keyword.get_values(opts, :wrapper_class) ++ ["row", "form-group"]
    inputs_classes = Keyword.get_values(opts, :input_class) ++ ["form-control"]

    if form.errors[field], do: inputs_classes = inputs_classes ++ ["form-control-danger"]

mgwidmann

defmodule Ecto.Polymorphic do

  defmacro __using__(_) do
    quote do
      require Ecto.Schema
      import Ecto.Schema, except: [belongs_to: 2, belongs_to: 3]
      import unquote(__MODULE__)
    end
  end

mjrode

The Complete Guide to Nested Forms in Phoenix

I recently spent some time dealing with nested forms in Phoenix. Nested forms are great when you want to create multiple database records in a single transaction and associate them with each other. I am new to Phoenix and really struggled to find any resources that helped me with my specific problem. I decided to document what I learned in the process in hopes of helping others that are new to Elixir and Phoenix.

Here is my attempt at a one stop shop to learn everything you will need to know about nested forms. If you would like to view the GitHub repo you can check it out here.

Thanks to Heartbeat and Jose for excellent blog posts on nested forms. Also shoutout to Josh for showing me some examples at Ruby

ahupowerdns

LUA Record Type for Lua-powered DNS records for standards based fail-over and geographical load balancing

GitHub branch -> https://github.com/ahupowerdns/pdns/tree/luarec

Recently, many zone owners could not migrate away from Dyn since they were benefiting from non-standardised DNS-based failover and geographical loadbalancing features. What you see below is an attempt to get standards based but flexible equivalents of these currently proprietary features. Here is a zone:

$TTL 60
lua.br. IN      SOA     a.lua.br. nstld.verisign-grs.com. (
        2016032300      ; Serial
        14400           ; Refresh

ipbastola

JQ to filter JSON by value

Syntax: cat <filename> | jq -c '.[] | select( .<key> | contains("<value>"))'

Example: To get json record having _id equal 611

cat my.json | jq -c '.[] | select( ._id | contains(611))'

Remember: if JSON value has no double quotes (eg. for numeric) to do not supply in filter i.e. in contains(611)

madsen

Twilio Secure Trunking with Asterisk

Twilio now allows TLS & SRTP connections with their Elastic SIP Trunking. However, there are some issues with the way they've done it that prevent Asterisk from being able to verify their server's certificate.

First of all, their documentation tells you to download the Thawte Primary Root CA, when the certificate I saw was signed with the

omegahm

#!/usr/bin/env bash

# Colours picked from https://robinpowered.com/blog/best-practice-system-for-organizing-and-tagging-github-issues/

###
# Label definitions
###
declare -A LABELS

# Platform

gist:402ab895a5410e4cd250

int[][] result;
float t, c;

float ease(float p) {
  return 3*p*p - 2*p*p*p;
}

float ease(float p, float g) {
  if (p < 0.5) 
    return 0.5 * pow(2*p, g);