dade
dade is data definition for Rust structures.
For the easy handle of data, the following will support it.
- Data validation.
- Data schema conforms JsonSchema.
Example
Basic
To define a model, You need the below module.
use dade::{Model, model};
For example, define user-model.
, #[field(default = false)] verified: bool, }">
#[model] struct User { #[field(ge = 1)] id: u64, #[field(min_length = 1, max_length = 100)] name: String, #[field(default = "en")] lang: String, #[field(min_length = 1, max_length = 255, default = null)] url: Option<String>, #[field(default = false)] verified: bool, }
Then you create an instance of the model by the below.
let input = "{\"id\": 1, \"name\": \"James Smith\"}";
let user = User::parse(input).unwrap();
And you get a Json string for the instance by the below.
let json_string = user.json(false);
// json_string = "{\"id\":1,\"name\":\"James Smith\",\"lang\":\"en\",\"url\":null,\"verified\":false}"
If you want to validate a value, you will get a schema that conforms JsonSchema, for the given model, by the below.
let schema = User::schema();
The schema is
{
"$ref": "#/definitions/User",
"definitions": {
"User": {
"title": "User",
"type": "object",
"properties": {
"id": {
"type": "integer",
"title": "Id",
"minimum": 1
},
"name": {
"type": "string",
"title": "Name",
"minLength": 1,
"maxLength": 100
},
"lang": {
"type": "string",
"title": "Lang",
"default": "en"
},
"url": {
"type": "string",
"title": "Url",
"default": null,
"minLength": 1,
"maxLength": 255
},
"verified": {
"type": "boolean",
"title": "Verified",
"default": false
}
},
"required": ["id", "name"]
}
}
}
Advance
- If you want to bind other name
#[model]
struct User {
id: u64,
#[field(alias = "FirstName")]
first_name: String,
#[field(alias = "LastName")]
last_name: String,
}
- If you need a nested model
#[model]
struct Name {
first_name: String,
last_name: String,
}
#[model]
struct User {
id: u64,
name: Name,
}
- If you need a self-reference model
#[model]
struct Item {
id: u64,
name: String,
value: u128,
related_items: Option<Vec<Box<Item>>>,
}
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