Ghost/ghost/admin/app/adapters/product.js

import ApplicationAdapter from 'ghost-admin/adapters/application';

export default ApplicationAdapter.extend({
    queryRecord(store, type, query) {
        if (query && query.id) {
            let {id} = query;
            delete query.id;
            let url = this.buildURL(type.modelName, id, query, 'findRecord');
            return this.ajax(url, 'GET', {data: query});
        }

        return this._super(...arguments);
    },

    urlForDeleteRecord() {
        let url = this._super(...arguments);
        let parsedUrl = new URL(url);

        return parsedUrl.toString();
    }
});