137 lines
3.9 KiB
Markdown
137 lines
3.9 KiB
Markdown
# 🦷 DentalApp Database Restore Guide
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This document explains how to **restore the DentalApp PostgreSQL database** on a new PC using the latest backup file from the main PC.
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---
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## 🧩 Overview
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You will:
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1. Create a PostgreSQL backup on the **main PC**
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2. Copy it to the **target PC**
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3. Restore it cleanly using `pg_restore`
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---
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## ⚙️ Prerequisites
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Before starting:
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- PostgreSQL is installed on both machines (same major version recommended)
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- The app is **not running** during restore
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- You know the database credentials
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*(from `.env` or environment variables)*
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Example:
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```bash
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DATABASE_URL=postgresql://postgres:mypassword@localhost:5432/dentalapp
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```
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## 🧭 Steps to Restore Database on Another PC
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### 🖥️ Step 1 — Create Backup on Main PC
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- Generate the backup.dump file from the backup page from the app.
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### Step 2 — Copy Backup File to Target PC
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- Transfer the backup file to the second PC using USB, network share, cloud, or SCP.
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= Example destination path:
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C:\db_backups\backup.dump
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### 🧹 Step 3 — Prepare the Target PC
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- Stop the DentalApp application to avoid database locks.
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- Ensure PostgreSQL is installed and running.
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- (Optional but recommended) Drop the existing database:
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```
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PGPASSWORD='mypassword' dropdb -U postgres -h localhost dentalapp
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```
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### ♻️ Step 4 — Restore the Database
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# Case1: when we got a zip folder.
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-linux bash
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# 4.1) unzip to a directory
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```
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unzip backup.zip -d /tmp/dental_dump_dir
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```
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# 4.2) restore into an already-created DB named 'dentalapp'
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```
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PGPASSWORD='mypassword' createdb -U postgres -h localhost -O postgres dentalapp # optional
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PGPASSWORD='mypassword' pg_restore -U postgres -h localhost -d dentalapp -j 4 /tmp/dental_dump_dir
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or
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PGPASSWORD='mypassword' /usr/lib/postgresql/17/bin/pg_restore -v -U postgres -h localhost -C -d postgres /tmp/dental_dump_dir
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```
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# Case2: when we got a tar folder.
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-linux bash
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# 4.1) unzip to a directory
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```
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unzip backup.zip -d /tmp/dental_dump_dir
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```
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# 4.2) restore into an already-created DB named 'dentalapp'
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```
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PGPASSWORD='mypassword' createdb -U postgres -h localhost -O postgres dentalapp # optional
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PGPASSWORD='mypassword' pg_restore -U postgres -h localhost -d dentalapp -j 4 /tmp/dental_dump_dir
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or
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PGPASSWORD='mypassword' /usr/lib/postgresql/17/bin/pg_restore -v -U postgres -h localhost -C -d postgres /tmp/dental_dump_dir
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```
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### ✅ Step 5 — Verify the Restore
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- Check that the tables are restored successfully:
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```
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PGPASSWORD='mypassword' psql -U postgres -h localhost -d dentalapp -c "\dt"
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```
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- You should see all the application tables listed.
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### 🧩 Step 6 — Update App Configuration
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- Ensure the .env file on the target PC points to the correct database:
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```
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DATABASE_URL=postgresql://postgres:mypassword@localhost:5432/dentalapp
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```
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- Then start the DentalApp application and verify that it connects and displays data correctly.
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# 🧠 Step 7 — Tips
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- Use the same PostgreSQL version as the main PC.
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- For large databases, use parallel restore for speed:
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```
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pg_restore -U postgres -j 4 -d dentalapp backup.dump
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```
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- Always keep at least one recent backup archived safely.
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# If such error came:
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- pg_restore: error: unsupported version (1.16) in file header
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- use cmd:
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- 1) Add PGDG (official PostgreSQL) APT repo and its key, then update and install client-17
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```
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sudo apt update && sudo apt install -y wget ca-certificates gnupg lsb-release
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curl -fsSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo gpg --dearmor -o /usr/share/keyrings/pgdg.gpg
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echo "deb [signed-by=/usr/share/keyrings/pgdg.gpg] http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main" | sudo tee /etc/apt/sources.list.d/pgdg.list
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sudo apt update
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sudo apt install -y postgresql-client-17
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```
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- 2) Run pg_restore from the installed v17 binary (replace password as needed)
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```
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PGPASSWORD='mypassword' /usr/lib/postgresql/17/bin/pg_restore -v -U postgres -h localhost -C -d postgres ./backup.dump
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``` |