ez commits for green bar

Makefile

@@ -0,0 +1,10 @@
+postgres:
+  docker run --name postgres -p 5432:5432 -e POSTGRES_USER=root -e POSTGRES_PASSWORD=<password> -d postgres:latest
+
+createdb:
+  docker exec -it postgres createdb --username=root --owner=root simple_bank
+
+dropdb:
+   docker exec -it postgres drobdb simple_bank
+
+.PHONY: postgres createdb dropdb

README.md

@@ -1,2 +1,6 @@
 # go-playground
 Go code for public personal projects
+
+## project ideas
+1. card counting app
+2. some terminal based game?

db/migration/000001_init_schema.down.sql

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+DROP TABLE IF EXISTS entries;
+DROP TABLE IF EXISTS transfers;
+DROP TABLE IF EXISTS accounts;

db/migration/000001_init_schema.up.sql

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+CREATE TABLE "accounts" (
+  "id" bigserial PRIMARY KEY,
+  "owner" varchar NOT NULL,
+  "balance" bigint NOT NULL,
+  "currency" varchar NOT NULL,
+  "created_at" timestamptz NOT NULL DEFAULT (now())
+);
+
+CREATE TABLE "entries" (
+  "id" bigserial PRIMARY KEY,
+  "account_id" bigint,
+  "amount" bigint NOT NULL,
+  "created_at" timestamptz NOT NULL DEFAULT (now())
+);
+
+CREATE TABLE "transfers" (
+  "id" bigserial PRIMARY KEY,
+  "from_account_id" bigint,
+  "to_account_id" bigint,
+  "amount" bigint NOT NULL,
+  "created_at" timestamptz NOT NULL DEFAULT (now())
+);
+
+CREATE INDEX ON "accounts" ("owner");
+
+CREATE INDEX ON "entries" ("account_id");
+
+CREATE INDEX ON "transfers" ("from_account_id");
+
+CREATE INDEX ON "transfers" ("to_account_id");
+
+CREATE INDEX ON "transfers" ("from_account_id", "to_account_id");
+
+COMMENT ON COLUMN "entries"."amount" IS 'can be negative or positive';
+
+COMMENT ON COLUMN "transfers"."amount" IS 'must be positive';
+
+ALTER TABLE "entries" ADD FOREIGN KEY ("account_id") REFERENCES "accounts" ("id");
+
+ALTER TABLE "transfers" ADD FOREIGN KEY ("from_account_id") REFERENCES "accounts" ("id");
+
+ALTER TABLE "transfers" ADD FOREIGN KEY ("to_account_id") REFERENCES "accounts" ("id");
+