83 lines
2.4 KiB
Rust
83 lines
2.4 KiB
Rust
use herodb::db::{DB, DBBuilder, Model};
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use serde::{Deserialize, Serialize};
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use chrono::Utc;
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// Define a simple Product model
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#[derive(Debug, Clone, Serialize, Deserialize)]
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struct SimpleProduct {
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id: u32,
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name: String,
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description: String,
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price: f64,
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created_at: chrono::DateTime<Utc>,
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}
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// Implement the Model trait for SimpleProduct
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impl Model for SimpleProduct {
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fn get_id(&self) -> u32 {
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self.id
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}
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fn db_prefix() -> &'static str {
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"simple_product"
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}
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}
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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println!("OurDB Minimal Example");
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println!("====================\n");
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// Create a temporary directory for the database
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let db_path = std::env::temp_dir().join("herodb_minimal_example");
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std::fs::create_dir_all(&db_path)?;
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println!("Creating database at: {}", db_path.display());
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// Create a new database with SimpleProduct model registered
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let db = DBBuilder::new(db_path.clone())
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.register_model::<SimpleProduct>()
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.build()?;
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println!("Database created successfully");
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// Create a product
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let product = SimpleProduct {
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id: 1,
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name: "Test Product".to_string(),
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description: "A test product for our minimal OurDB example".to_string(),
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price: 99.99,
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created_at: Utc::now(),
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};
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println!("\nCreated product: {}", product.name);
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println!("Product ID: {}", product.get_id());
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// Insert the product into the database
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db.set(&product)?;
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println!("Product saved to database");
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// Retrieve the product from the database
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let retrieved_product = db.get::<SimpleProduct>(product.get_id())?;
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println!("\nRetrieved product from database:");
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println!(" Name: {}", retrieved_product.name);
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println!(" Description: {}", retrieved_product.description);
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println!(" Price: ${}", retrieved_product.price);
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// Delete the product
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db.delete::<SimpleProduct>(product.get_id())?;
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println!("\nProduct deleted from database");
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// Try to retrieve the deleted product (should fail)
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match db.get::<SimpleProduct>(product.get_id()) {
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Ok(_) => println!("Product still exists (unexpected)"),
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Err(e) => println!("Verified deletion: {}", e),
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}
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println!("\nExample completed successfully!");
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// Clean up
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std::fs::remove_dir_all(&db_path)?;
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println!("Cleaned up database directory");
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Ok(())
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} |