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I'm a developer from Vancouver, BC who's had an interesting journey in tech starting from support, through cloud infrastructure and project management. Currently I work as an SRE at lightstep helping build and "operationalize" things that helps to guide others towards better o11y :)
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How a quotable movie from the 90's drove me to build our internal support & success tooling.
How Terraform's setunion() disregards ordering.
How using a table during the planning step could have saved a lot of headache.
A practical guide in using Bash to solve a real-world problem with examples.
This week I've been finishing up a task that involves updating our CI/CD pipeline to make use of a feature available in the newest release of the Open Telemetry Collector to validate configuration files. In doing so, I got a chance to get up close an...
Tutorials Notebook is a blog series where I write-up my thoughts & lessons learned after completing a tutorial. A large credit should go to the authors who created the tutorials in the first place.
Tutorial: https://codewithmukesh.com/blog/implementing-crud-in-golang-rest-api/ by Mukesh Murugan
Lately, a couple of things have been motivating me to learn and get better with GoLang.
There's a project that I've wanted to build for a friend since last year;
I'm ending up working more and more in our codebase at work which is all written in Go.
So I figured I'd start from scratch and work towards the goal of building that app for my friend.
Breaking down that task - one thing I'll need to do is create an API that can handle incoming requests. Today, I completed a tutorial to create a very basic app that would enable a user to Create, Retrieve, Update and Delete (CRUD) a product from a database.
MySQL. It'd been a while since I'd created a database. Helpful commands on mac:
brew install mysql - Install the MySQL server on mac.
brew services start mysql - Start the MySQL server
mysql -u root - Login with username root and no password (default)
create database <name>;
use database <name>;
show tables;
VS Code Shortcut: Typing in hand (+ enter) in VS Code will automatically create a HTTP response handler for you.
Go Pointers
product consists of 4 pieces of information.type Product struct {
ID uint `json:"id"`
Name string `json:"name"`
Price float64 `json:"price"`
Description string `json:"description"`
}
POST ing (creating) products.func CreateProduct(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
var product entities.Product
json.NewDecoder(r.Body).Decode(&product)
database.Instance.Create(&product)
json.NewEncoder(w).Encode(product)
}
Where the important lines are:
var product entities.Product - this line creates an "empty" product that contains the 0 (or nil) values defined int he struct.
json.NewDecoder(r.Body).Decode(&product) - In this line, we use the memory address of variable product as denoted by the & to "fill" it with relevant data.
