rustorm
A Work in Progress rust ORM library for Postgresql
A fork of my previous, very simple ORM which was written in java
Dependency
Features
- intelligent model code generation (The only functional part for now)
- Can figure out linker tables, then build 1:M relation with the tables on the generated code
- Can figure out extension tables, which is just 1:1 relation with another table
To see it in action:
Put the sample database in your local postgresql installation
```bash
psql -U postgres -h localhost -W -d -f ./scripts/bazaarv6all.sql
```
Alternatively, you can
```bash
sh ./scripts/setup.sh
``
Look at the code./examples/generatemodelcode.rs`
This will be the code to generate the model code based on the table schema and relationships to other tables.
```rust
///generatemodelcode.rs
extern crate rustorm;
use rustorm::db::postgres::Postgres;
use rustorm::codegen;
use rustorm::codegen::Config;
fn main(){
let pg:Result = Postgres::new("postgres://postgres:p0stgr3s@localhost/bazaarv6");
match pg{
Ok(pg) => {
let config = Config{
basemodule:Some("gen".tostring()),
includetablereferences:true,
usecondensedname:true,
generatetablemeta:true,
basedir:"./examples".tostring(),
};
codegen::generateall(&pg, &config);
}
Err(error) =>{
println!("{}",error);
}
}
}
```
bash
cargo run --release --example generate_model_code
cat ./examples/gen/bazaar/product.rs
Product table as an example
This is an example table product in schema bazaar (./scripts/bazaar_v6_dump_schema.sql)
```sql
CREATE TABLE bazaar.product
(
-- Inherited from table system.record: organizationid uuid, -- @Value(users.userid) , which means the value will be set with the users.userid value...
-- Inherited from table system.record: clientid uuid, -- @Value(users.clientid) The clientid of the user creating this records
-- Inherited from table system.record: created timestamp with time zone NOT NULL DEFAULT now(),
-- Inherited from table system.record: createdby uuid, -- @Value(users.userid)
-- Inherited from table system.record: updated timestamp with time zone NOT NULL DEFAULT now(),
-- Inherited from table system.record: updatedby uuid, -- @Value(users.userid)
-- Inherited from table system.record: priority numeric,
-- Inherited from table system.record: name character varying, -- This is @Required it has @DisplayLength(50) - 50 character in display length a @MinLength(1) and @MaxLength(100) - Do not go over 100 characters or else the system will throw a ValueTooLong exception...
-- Inherited from table system.record: description character varying, -- @DisplayLength(100) When building a UI for this field...
-- Inherited from table system.record: help text,
-- Inherited from table system.record: active boolean NOT NULL DEFAULT true, -- @Active
productid uuid NOT NULL DEFAULT uuidgeneratev4(),
parentproductid uuid,
isservice boolean DEFAULT false,
price numeric,
useparentprice boolean DEFAULT false,
unit character varying,
tags json,
info json, -- {color:"red",...
seqno integer, -- @Sequence can be used to do alternate ordering of the values, when alphetical or time can not be used
upfrontfee numeric DEFAULT 0.00, -- Applicable to services, usually services has an upfront fee
barcode character varying, -- barcode if scanning the product, conflict can happen, expect to return matching list of products using the barcode
ownerid uuid, -- Whom this product belongs, since createdby can be someone else create the product list in behalf of the owner of the product
currencyid uuid,
CONSTRAINT productpkey PRIMARY KEY (productid),
CONSTRAINT productcurrencyidfkey FOREIGN KEY (currencyid)
REFERENCES payment.currency (currencyid) MATCH SIMPLE
ON UPDATE CASCADE ON DELETE RESTRICT DEFERRABLE INITIALLY DEFERRED,
CONSTRAINT productuseridfkey FOREIGN KEY (ownerid)
REFERENCES bazaar.users (user_id) MATCH SIMPLE
ON UPDATE CASCADE ON DELETE RESTRICT DEFERRABLE INITIALLY DEFERRED
)
INHERITS (system.record)
```
Look at the file ./examples/gen/bazaar/product.rs
The generated rust code should look like
```rust
///
/// This will be exposed as an @Api, including @Table(users, category, product_availability, photo)
///
[derive(RustcDecodable, RustcEncodable)]
[derive(Debug)]
pub struct Product {
/// primary
/// default: uuidgeneratev4()
/// not nullable
/// db data type: uuid
pub productid:Uuid,
/// barcode if scanning the product, conflict can happen, expect to return matching list of products using the barcode
/// db data type: character varying
pub barcode:Option,
/// db data type: uuid
pub currencyid:Option,
/// {color:"red",
/// dimension:"10x20x30",
/// dimensionUnit:"mm",
/// weight:"4",
/// weightUnit:"kg"
/// }
/// db data type: json
pub info:Option,
/// default: false
/// db data type: boolean
pub isservice:Option,
/// Whom this product belongs, since createdby can be someone else create the product list in behalf of the owner of the product
/// db data type: uuid
pub ownerid:Option,
/// db data type: uuid
pub parentproductid:Option,
/// db data type: numeric
pub price:Option,
/// @Sequence can be used to do alternate ordering of the values, when alphetical or time can not be used
/// db data type: integer
pub seqno:Option,
/// db data type: json
pub tags:Option,
/// db data type: character varying
pub unit:Option,
/// Applicable to services, usually services has an upfront fee
/// default: 0.00
/// db data type: numeric
pub upfrontfee:Option,
/// default: false
/// db data type: boolean
pub useparentprice:Option,
/// @Active
/// default: true
/// not nullable
/// --inherited--
/// db data type: boolean
pub active:bool,
/// @Value(users.clientid) The clientid of the user creating this records
/// --inherited--
/// db data type: uuid
pub clientid:Option,
/// default: now()
/// not nullable
/// --inherited--
/// db data type: timestamp with time zone
pub created:DateTime,
/// @Value(users.userid)
/// --inherited--
/// db data type: uuid
pub createdby:Option,
/// @DisplayLength(100) When building a UI for this field
/// @MaxLength(200) Do not go over 200 character on this one
/// --inherited--
/// db data type: character varying
pub description:Option,
/// --inherited--
/// db data type: text
pub help:Option,
/// This is @Required it has @DisplayLength(50) - 50 character in display length a @MinLength(1) and @MaxLength(100) - Do not go over 100 characters or else the system will throw a ValueTooLong exception
/// can also be express with @Length(1-100)
/// --inherited--
/// db data type: character varying
pub name:Option,
/// @Value(users.userid) , which means the value will be set with the users.userid value
///
/// @Where(users.active=true)
/// --inherited--
/// db data type: uuid
pub organizationid:Option,
/// --inherited--
/// db data type: numeric
pub priority:Option,
/// default: now()
/// not nullable
/// --inherited--
/// db data type: timestamp with time zone
pub updated:DateTime,
/// @Value(users.userid)
/// --inherited--
/// db data type: uuid
pub updatedby:Option,
/// has one
pub owner:Option,
/// has one
pub currency:Option,
/// has one, extension table
pub productavailability:Option>,
/// has many, indirect referring table, derived from linker table: productcategory
pub category:Option>,
/// has many, indirect referring table, derived from linker table: productphoto
pub photo:Option>,
/// has many, indirect referring table, derived from linker table: productreview
pub review:Option>,
}
```
Take notice of these last members of the struct here
```rust
/// has one, extension table
pub product_availability:Option<Box<ProductAvailability>>,
/// has many, indirect referring table, derived from linker table: product_category
pub category:Option<Vec<Category>>,
/// has many, indirect referring table, derived from linker table: product_photo
pub photo:Option<Vec<Photo>>,
/// has many, indirect referring table, derived from linker table: product_review
pub review:Option<Vec<Review>>,
```
- The code generator can figure out that product_availability is just an extension table of the product table.
- It also knows that product:categories has 1:M relationship hinted by the linker table product_category, and so with the Photos and Reviews.
- The
created column has a data type DateTime<UTC>, since it is not nullable, while nullable columns such as created_by will be wrapped with Option<Uuid>,
I have the generated model code, Now what?
```rust
use gen::bazaar::Product;
// this is the generated module, generated by generatemodelcode example
mod gen;
fn main(){
let pg:Result = Postgres::new("postgres://postgres:p0stgr3s@localhost/bazaarv6");
match pg{
Ok(pg) => {
let sql = "select * from bazaar.product".tostring();
let stmt = pg.conn.prepare(&sql).unwrap();
for row in stmt.query(&[]).unwrap() {
let product = Product{
productid: row.get("productid"),
barcode: row.getopt("barcode").ok(),
currencyid: row.getopt("currencyid").ok(),
info: row.getopt("info").ok(),
isservice: row.getopt("isservice").ok(),
ownerid: row.getopt("ownerid").ok(),
parentproductid: row.getopt("parentproductid").ok(),
price: row.getopt("price").ok(),
seqno: row.getopt("seqno").ok(),
tags: row.getopt("tags").ok(),
unit: row.getopt("unit").ok(),
upfrontfee: row.getopt("upfrontfee").ok(),
useparentprice: row.getopt("useparentprice").ok(),
active: row.get("active"),
clientid: row.getopt("clientid").ok(),
created: row.get("created"),
createdby: row.getopt("createdby").ok(),
description: row.getopt("description").ok(),
help: row.getopt("help").ok(),
name: row.getopt("name").ok(),
organizationid: row.getopt("organizationid").ok(),
priority:row.getopt("priority").ok(),
updated:row.get("updated"),
updatedby: row.getopt("updatedby").ok(),
owner:None,
currency:None,
productavailability:None,
category:None,
photo:None,
review:None
};
println!("product:{}({})", product.name.asref().unwrap(), product.productid);
println!("{},", json::aspretty_json(&product));
}
}
Err(error) =>{
println!("{}",error);
}
}
}
```
```sh
cargo run --release --example test_product
sh
product:iphone4s(f7521093734d488a9f60fc9f11f7e750)
...
```
Documentation
docs
Roadmap
- Implement all the features in ivanceras/orm
- Automatic conversion of Row to objects (of the generated model)
- Automatic conversion of HashMap to objects
- Implement the declarative Query API
- become a full blown ORM for rust
- Support for sqlite
For Updates
Follow me on twitter: @ivanceras
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