rustyroad 1.7.4

Rusty Road is a framework written in Rust that is based on Ruby on Rails. It is designed to provide the familiar conventions and ease of use of Ruby on Rails, while also taking advantage of the performance and efficiency of Rust.
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//! The struct declaration, its submodules, and the enum types it imports.

use super::fields;
use crate::database::introspection::Schema;
use crate::generators::rust::casing;
use crate::generators::rust::model::Model;
use std::fmt::Write as _;

/// Derives every generated model carries.
///
/// `FromRow` is what makes `query_as` work, `ToSchema` puts the model in the OpenAPI document,
/// and `TS` exports the TypeScript interface, so a column reaches the API surface and the
/// frontend types without being described again.
const DERIVES: &str =
    "#[derive(Debug, Clone, Serialize, Deserialize, FromRow, ToSchema, TS)]\n#[ts(export)]";

/// Declares the submodules the model actually has.
///
/// The CRUD modules are private, because they contribute `impl` blocks rather than names: the
/// methods they define are reached through the struct, which is already public. `routes` is the
/// exception — the parent's `configure` and utoipa's `paths(...)` both name its handlers.
pub(super) fn submodules(model: &Model) -> String {
    let mut file = if model.view {
        "mod read;\n".to_string()
    } else {
        "mod create;\nmod delete;\nmod read;\nmod update;\n".to_string()
    };

    if model.actix {
        file.push_str("pub mod routes;\n");
    }
    file.push('\n');

    file
}

/// Renders the `use` line for the enum types this model's columns reference.
///
/// From this file `super` is the models root itself, where the shared `enums` module lives —
/// one level shallower than the CRUD submodules, whose path is `super::super`.
pub(super) fn enum_imports(model: &Model, schema: &Schema) -> String {
    let names: Vec<String> = model
        .enums(schema)
        .iter()
        .map(|item| casing::to_pascal(&item.name))
        .collect();

    match names.len() {
        0 => String::new(),
        1 => format!("use super::enums::{};\n", names[0]),
        _ => format!("use super::enums::{{{}}};\n", names.join(", ")),
    }
}

/// Renders the struct itself.
pub(super) fn declaration(model: &Model) -> String {
    format!(
        "{DERIVES}\npub struct {} {{\n{}}}\n",
        model.name,
        fields::render(model)
    )
}

/// Renders the optional filters accepted by a view's `all_options` query.
pub(super) fn all_options(model: &Model) -> String {
    let mut fields = String::new();
    for field in &model.fields {
        let _ = writeln!(
            fields,
            "\tpub {}: Option<{}>,",
            field.ident,
            field.key_type()
        );
    }

    format!(
        "/// Optional equality filters for [`{name}::all_options`].\n\
         #[derive(Debug, Clone, Default)]\n\
         pub struct {options} {{\n{fields}}}\n",
        name = model.name,
        options = model.all_options_name(),
    )
}