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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

@iangow
iangow / column_reorder.sql
Created July 29, 2016 18:05
Change order of columns in PostgreSQL
CREATE TABLE tone_data_temp AS
SELECT file_name, last_update, category, word_count, litigious,
positive, uncertainty, negative, modal_strong, modal_weak
FROM bgt.tone_data;
DROP TABLE bgt.tone_data;
ALTER TABLE tone_data_temp RENAME TO tone_data;
ALTER TABLE tone_data SET SCHEMA bgt;
@destan
destan / ParseRSAKeys.java
Last active March 31, 2025 23:14
Parse RSA public and private key pair from string in Java
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
@maxvt
maxvt / infra-secret-management-overview.md
Last active February 3, 2025 06:11
Infrastructure Secret Management Software Overview

Currently, there is an explosion of tools that aim to manage secrets for automated, cloud native infrastructure management. Daniel Somerfield did some work classifying the various approaches, but (as far as I know) no one has made a recent effort to summarize the various tools.

This is an attempt to give a quick overview of what can be found out there. The list is alphabetical. There will be tools that are missing, and some of the facts might be wrong--I welcome your corrections. For the purpose, I can be reached via @maxvt on Twitter, or just leave me a comment here.

There is a companion feature matrix of various tools. Comments are welcome in the same manner.

@mandiwise
mandiwise / Count lines in Git repo
Last active April 1, 2025 02:43
A command to calculate lines of code in all tracked files in a Git repo
// Reference: http://stackoverflow.com/questions/4822471/count-number-of-lines-in-a-git-repository
$ git ls-files | xargs wc -l
@dearaujoj
dearaujoj / remove_git_tag
Created October 22, 2013 10:02
git remove tag locally and remote
git tag -d TagName && git push origin :refs/tags/TagName
@gevans
gevans / encryption-decryption.rb
Created July 16, 2013 00:24
A couple examples of using asymmetric RSA signing and encryption using Ruby's OpenSSL libraries.
require 'openssl'
key = OpenSSL::PKey::RSA.new(2048)
p encrypted_string = key.public_encrypt('my plaintext string', OpenSSL::PKey::RSA::PKCS1_OAEP_PADDING)
p decrypted_string = key.private_decrypt(encrypted_string, OpenSSL::PKey::RSA::PKCS1_OAEP_PADDING)