Best way to load a ton of JSON data into an Ember App

Fixed it! Thanks to another one of your answers. :nerd_face:

Added another route above terms to separate term/letter from terms/letter/term_id.

Router.map(function() {
  this.route("home", { path: "/" });
  this.route("term", function() {
    this.route("letter", { path: "/:letter" })
  });
  this.route("terms", function() {
    this.route("letter", { path: "/:letter" }, function() {
      this.route("term_id", { path: "/:term_id" });
    });
  });
});

Then just added a new this.get to the mirage config.

export default function() {
  this.namespace = "api";
  this.get("/term", function({ terms }, { queryParams }) {
    let { letter } = queryParams;
    let results = terms.all();
    if (letter) {
      const match = letter.toLowerCase();
      results = results.filter(t => t.term.toLowerCase()[0] === match);
    }
    return results;
  });
  this.get("/terms", function({ terms }, { queryParams }) {
    let { term, letter } = queryParams;
    let results = terms.all();
    if (letter) {
      const match = letter.toLowerCase();
      results = results.filter(t => t.term.toLowerCase()[0] === match);
    }
    if (term) {
      const match = term.toLowerCase();
      results = results.filter(t => t.term.toLowerCase().includes(match));
    }
    return results;
  });
this.get("/terms/:id");
}

Works like a charm. POW!

Have a great weekend!!