added support for RemoveVertex, UpdateEdge, and EdgeCount

[jonbrandenburg]

This is an attempt to update the library to support the latest changes / graph.Store interface. I recognize this PR might be more palatable if it were broken down into smaller chunks and/or reworked however I thought I'd post it now to get some feedback before doing any more work on it.

[ngfgrant]

This looks ok to me @dominikbraun is it worth merging in?

[dominikbraun]

@ngfgrant Absolutely, I haven't had the time yet but I'm going to merge @jonbrandenburg's PRs in this and the main repo soon.

[ngfgrant]

Nice one - let me know if I can help in any way 👍

[nicocesar]

Update on this? I also bumped into the same issue.

quick hack on your go.mod, use jonbrandenburg patched version:

module nicograph

go 1.23.3

require (
	github.com/dominikbraun/graph v0.23.0
	github.com/dominikbraun/graph-sql v0.0.0-20241120000000-d8bb785eba28
	github.com/mattn/go-sqlite3 v1.14.24
)

require (
	github.com/Masterminds/squirrel v1.5.3 // indirect
	github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 // indirect
	github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
)

replace github.com/dominikbraun/graph-sql => github.com/jonbrandenburg/graph-sql v0.0.0-20230718002458-d8bb785eba28

I'll leave here a snippet of code that won't compile yet. When this gets merged it will be easy to check:

package main

import (
	"database/sql"
	"log"

	"github.com/dominikbraun/graph"
	graphsql "github.com/dominikbraun/graph-sql"
	_ "github.com/mattn/go-sqlite3" // SQLite driver
)

// Room represents a room in the house
type Room struct {
	Name        string
	Description string
}

func main() {
	// Open the SQLite database file
	db, err := sql.Open("sqlite3", "database.sqlite")
	if err != nil {
		panic(err)
	}
	defer db.Close() // Ensure the database connection is closed when done

	// Set up the graph-sql store with SQLite
	store := graphsql.New[string, Room](db, graphsql.DefaultConfig)

	// Create tables in the SQLite database
	if err = store.SetupTables(); err != nil {
		log.Fatal(err)
	}

	// Initialize a graph with the SQLite store
	roomHash := func(r Room) string {
		return r.Name
	}

	// Check if the store implements the graph.Store interface. If not, the
	// program will not compile, and will have a better error message than the
	// below.
	var _ graph.Store[string, Room] = (*graphsql.Store[string, Room])(nil)

	g := graph.NewWithStore(roomHash, store)

	// Define the rooms in the house
	kitchen := Room{Name: "Kitchen", Description: "Where meals are prepared"}
	livingRoom := Room{Name: "Living Room", Description: "Where family gathers"}
	bedroom := Room{Name: "Bedroom", Description: "Where you sleep"}
	bathroom := Room{Name: "Bathroom", Description: "Where personal hygiene is maintained"}
	hallway := Room{Name: "Hallway", Description: "Connects the rooms"}

	// Add the rooms (vertices) to the graph
	_ = g.AddVertex(kitchen)
	_ = g.AddVertex(livingRoom)
	_ = g.AddVertex(bedroom)
	_ = g.AddVertex(bathroom)
	_ = g.AddVertex(hallway)

	// Define the connections (edges) between rooms
	_ = g.AddEdge(kitchen, hallway)
	_ = g.AddEdge(livingRoom, hallway)
	_ = g.AddEdge(bedroom, hallway)
	_ = g.AddEdge(bathroom, hallway)
	_ = g.AddEdge(kitchen, livingRoom)

	log.Println("House graph created with rooms and connections!")
}