crud.json

{
  activate: function(e, id) {
    // activate the form, enabling edits
    if (id == "new"){
      $(this).trigger('newitem');
    } else {
      $(this).trigger('loaditem', id);
    }
  },
  loaditem: function(e, id) {
    // load data from couchdb and display it in the form
    this.reset();
    var that = this;
    $$(this).app.db.openDoc(id, {
        error: function() {
          $$(that).ldoc = {_id:id}
          that.reset();
        },
        success: function(doc){
          $$(that).ldoc = doc;
          var fdoc = $.flatten(doc);
          for (var name in fdoc){
            $('[name='+name+']').val([fdoc[name]]);
          }
          $(that).trigger('postconstruct');
        }
    })
  },
  newitem: function(e) {
    // activate form for new items
    this.reset();
    $$(this).ldoc = {};
    $(this).trigger('postconstruct');
  },
  removeitem: function(e){
    // Self-explanatory, delete doc from couchdb
    if (confirm("Are you sure?")){
      $$(this).app.db.removeDoc($$(this).ldoc);
      $(this).trigger('predestroy');
    }
  },
  submit: function(e){
    // encode the data in form and save it to couchdb
    var reg = $.extend({},$$(this).ldoc, $(this).toDeepJson());
    var that = this;
    $$(this).app.db.saveDoc(reg,{
        success: function(res){
          reg._id = res.id;
          reg._rev = res.rev;
          $$(that).ldoc = reg;
          $(that).trigger('postconstruct');
        }
    });
    return false;
  }
} 

jquery.deepjson.js

(function( $ ){
  $.fn.toDeepJson = function() {
    function parse(val){
      if (val == ""){ return null; }
      if (val == "true"){ return true; }
      if (val == "false"){ return false; }
      if (val == String(parseInt(val))){ return parseInt(val); }
      if (val == String(parseFloat(val))){ return parseFloat(val); }
      return val;      
    }
    function toNestedObject(obj, arr){
      var key = arr.shift();
      if (arr.length > 0) {
        obj[key] = toNestedObject(obj[key] || {}, arr);
        return obj;
      }
      return key;
    }
    if (this.length == 1){
      return $.makeArray(this[0].elements)
      .filter(function(e){
          return e.name != "" && (e.type == 'radio' ? e.checked : true);
      })
      .map(function(e){
          var names = e.name.split('.');
          if (e.type == 'checkbox') {
            e.value = e.checked;
          }
          names.push(parse(e.value));
          return names;
      })
      .reduce(toNestedObject, {});
    } else {
      throw({error:"Can work on a single form only"})
    }
  };

  $.flatten = function (obj){
    var ret = {}
    for (var key in obj){
      if (typeof obj[key] == 'object'){
        var fobj = $.flatten(obj[key]);
        for (var extkey in fobj){
          ret[key+"."+extkey] = fobj[extkey];
        }
      } else {
        ret[key] = String(obj[key]);
      }
    }
    return ret;
  }
  
})( jQuery );

USAGE.md

CRUD requires jquery.deepjson.js to work so it should be included

<script type="text/javascript" src="js/jquery.deepjson.js"></script>

Then you can assign whatever's in crud.json to a variable or you can put crud.json into your evently directory and let couchapp push it to your application.

Simplest way to use it is

$.couch.app(function(app) {
  $('#form').evently(app.ddoc.evently.crud, app);
}

If you want to put some lifecycle methods around (you usually need)

$.couch.app(function(app) {
  $('#form').evently($.extend({}, app.ddoc.evently.crud, {
    postconstruct: function(e){
      // after form readies itself for editing
      // may show form or delete buttons here
    },
    predestroy: function(e) {
      // triggers on object deletion only
      // useful to hide form
    }
  }), app);
}

Then you can add function to your controls like

$('.items a').click(function(e){
    // edit item, doc id presumed set to id attr of a
    $('#form').trigger('activate',$(this).attr('id'));
});
$('button.new').click(function(e){
    // ready form for a new item
    $('#form').trigger('activate', 'new');
});
$('button.save').click(function(e){
    // save the form
    $('#form').submit();
});
$('button.delete').click(function(e){
    // delete the item set in form
    $('#form').trigger('removeitem');
});

It is possible to use $$('#form').ldoc to access the doc itself.