rustyroad 1.7.2

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.
Documentation 
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//! The keyed lookup.

use crate::generators::tetherscript::model::Model;
use crate::generators::tetherscript::render::sql;

/// Renders the keyed lookup.
///
/// Returns nil for a missing row rather than an error: a lookup that finds nothing is an
/// ordinary outcome, and an error would force every caller to inspect it to discover that
/// nothing was wrong.
pub(super) fn render(model: &Model, column: &str) -> String {
    format!(
        "// Returns the row with `key`, or nil when no row matches.\n\
         fn find(key) {{\n\
         \x20   let sql = \"SELECT * FROM {table} WHERE {column} = $1\"\n\n\
         \x20   let rows = db.query(sql, [key])?\n\
         \x20   if rows.len() == 0 {{\n\
         \x20       return Ok(nil)\n\
         \x20   }}\n\
         \x20   return Ok(rows[0])\n\
         }}\n\n",
        table = model.table,
        column = sql::quote(column)
    )
}

/// Explains why no keyed lookup was generated.
pub(super) fn unsupported(model: &Model) -> String {
    format!(
        "// No keyed lookup was generated for `{}`: a single-column primary key is\n\
         // needed to address one row.\n\n",
        model.table
    )
}