name = "my_app"
compatibility_date = "2023-10-30"
pages_build_output_dir = "./dist"

[[d1_databases]]
binding = "DB"
database_name = "my_app_database"
database_id = "(guid)"
migrations_dir = "sql/migrations"

[vars]
STAGE = "local"

[env.preview.vars]
STAGE = "preview"

[env.production.vars]
STAGE = "production"

import { D1Database } from "@cloudflare/workers-types";
import EventContext from "./EventContext";

class Database {
  db: D1Database;

  constructor(ctx: EventContext) {
    if (!ctx.env.DB) {
      console.error("Context environment:", ctx.env);
      throw new Error("Database instance is not available in the environment context.");
    }
    this.db = ctx.env.DB;
  }
...

"exceptions": [
    {
      "stack": "    at new Database (functionsWorker-0.5557135572831049.js:230:13)\n    at onRequestPost2 (functionsWorker-0.5557135572831049.js:388:20)\n    at async next (functionsWorker-0.5557135572831049.js:905:26)\n    at async Object.fetch (functionsWorker-0.5557135572831049.js:919:14)",
      "name": "Error",
      "message": "Database instance is not available in the environment context.",
      "timestamp": 1717214376469
    }
  ],

    {
      "message": [
        "Context environment:",
        {
          "ASSETS": {},
          "CF_PAGES": "1",
          "CF_PAGES_BRANCH": "main",
          "CF_PAGES_COMMIT_SHA": "(commit sha)",
          "CF_PAGES_URL": "(generated page url)",
          "STAGE": "production"
        }
      ],
      "level": "error",
      "timestamp": 1717214376469
    }