Changing from init() to start() causes error: "Cannot find template with ID main"

[gordon-matt]

I was trying to implement save to backend as per issue #73. However, I ran into some errors:

When I try using the .start() method instead of the init() method, I get the following error:
Missing initialization hash, redirecting to main entrypoint

and tracked it back to this error:
Error: Unable to process binding "template: function(){return 'main' }"
Message: Cannot find template with ID main

My code is as follows:

plugins = [
    // plugin for integrating save button
    function (viewModel) {
        var saveCmd = {
            name: 'Save',
            enabled: ko.observable(true)
        };

        saveCmd.execute = function () {
            saveCmd.enabled(false);
            viewModel.metadata.changed = Date.now();
            if (typeof viewModel.metadata.key == 'undefined') {
                var rnd = Math.random().toString(36).substr(2, 7);
                viewModel.metadata.key = rnd;
            }

            // This is the simplest for sending it as POST
            var postData = {
                //csrf_token: 'yourCsrfValueHere', // this is only required if your back-end requires csrf token
                metadata: viewModel.exportMetadata(),
                content: viewModel.exportJSON(),
                html: viewModel.exportHTML()
            };

            $.post('/mosaico/save', postData)
                .done(function () {
                    viewModel.notifier.success(viewModel.t('Successfully saved.'));
                })
                .fail(function (jqXHR, textStatus, error) {
                    console.log(textStatus);
                    console.log(error);
                    console.log(jqXHR);
                    viewModel.notifier.error(viewModel.t('Saving failed. Please try again in a few moments or contact us.'));
                })
                .always(function () {
                    saveCmd.enabled(true);
                });
        };

        viewModel.save = saveCmd;
    },
];

var ok = Mosaico.start({
    imgProcessorBackend: basePath + '/img/',
    emailProcessorBackend: basePath + '/dl/',
    titleToken: "MOSAICO Responsive Email Designer",
    //onSave: function (saveObject) { alert('hi'); },
    fileuploadConfig: {
        url: basePath + '/upload/'
    }
}, '/templates/versafix-1/template-versafix-1.html', undefined, undefined, plugins);

Any help much appreciated

[bago]

If you use start you can't check the return value as start doesn't return false or true.
So your editor.html will always tell you "Missing initialization hash, redirecting to main entrypoint"

[gordon-matt]

@bago Thanks for the help. I now have a fully working backend in .NET Core. For those interested, you can find it here