Python-сообщество

from myproject.models import City  
  
def autocomplete_cities(request):  
    def results_to_string(results):  
        if results:  
            for r in results:  
                yield '%s|%s\n' % (r.name, r.pk)  # вот это передаётся на страницу, для автокомплита.
  
    city = request.REQUEST.get('q', None)  
    country = request.REQUEST.get('country', None)  
  
    if city:  
        cities = City.objects.filter(city__istartswith=city)  
    else:  
        cities = City.objects.all()  
  
    if country:  
        cities = cities.filter(country__name=country)  
  
    cities = cities[:int(request.REQUEST.get('limit', 15))]  
    return results_to_string(cities, mimetype='text/plain')

from django import newforms as forms
from django.utils.translation import ugettext as _

from myproject.widgets import AutocompleteWidget

class GeoForm(forms.Form):
    name = forms.CharField(label=_('Name'))
    country = forms.CharField(label=_('Country'),
        widget=AutocompleteWidget(choices_url='autocomplete_countries', related_fields=('city',)))
    city = forms.CharField(label=_('City),
        widget=AutocompleteWidget(choices_url='autocomplete_cities', related_fields=('country',)))

# -*- coding:utf-8 -*-
from django.core.urlresolvers import reverse, NoReverseMatch
from django.forms import HiddenInput, TextInput
from django.utils import simplejson
from django.utils.safestring import mark_safe

class AutocompleteWidget(TextInput):
    """
    Autocomplete widget to use with jquery-autocomplete plugin.

    Widget can use for static and dynamic (AJAX-liked) data. Also
    you can relate some fields and it's values'll posted to autocomplete
    view.

    Widget support all jquery-autocomplete options that dumped to JavaScript
    via django.utils.simplejson.

    **Note** You must init one of ``choices`` or ``choices_url`` attribute.
    Else widget raises TypeError when rendering.
    """
    def __init__(self, attrs=None, choices=None, choices_url=None, options=None, related_fields=None):
        """
        Optional arguments:
        -------------------

            * ``choices`` - Static autocomplete choices (similar to choices
            used in Select widget).

            * ``choices_url`` - Path to autocomplete view or autocomplete
            url name.

            * ``options`` - jQuery autocomplete plugin options. Auto dumped
            to JavaScript via SimpleJSON

            * ``related_fields`` - Fields that relates to current (value
            of this field will sended to autocomplete view via POST)
        """
        self.attrs = attrs or {}
        self.choice, self.choices, self.choices_url = None, choices, choices_url
        self.options = options or {}

        if related_fields:
            extra = {}
            if isinstance(related_fields, str):
                related_fields = list(related_fields)

            for field in related_fields:
                extra[field] = "%s_value" % field

            self.extra = extra
        else:
            self.extra = {}

    def render(self, name, value=None, attrs=None):
        if not self.choices and not self.choices_url:
            raise TypeError('One of "choices" or "choices_url" keyword argument must be supplied obligatory.')

        if self.choices and self.choices_url:
            raise TypeError('Only one of "choices" or "choices_url" keyword argument can be supplied.')

        choices = ''

        if self.choices:
            self.set_current_choice(value)
            choices = simplejson.dumps([unicode(v) for k, v in self.choices], ensure_ascii=False)
            html_code = HiddenInput().render(name, value=value)
            name += '_autocomplete'
        else:
            html_code = ''

        if self.choices_url:
            try:
                choices = simplejson.dumps(reverse(str(self.choices_url)))
            except NoReverseMatch:
                choices = simplejson.dumps(self.choices_url)

        if self.options or self.extra:
            if 'extraParams' in self.options:
                self.options['extraParams'].update(self.extra)
            else:
                self.options['extraParams'] = self.extra

            options = ', ' + simplejson.dumps(self.options, indent=4, sort_keys=True)
            extra = []

            for k, v in self.extra.items():  
                options = options.replace(simplejson.dumps(v), v)  
                options = options.replace('\"', '') #fix problem with functions 
                extra.append(u"function %s() { return $('#id_%s').val(); }\n" % (v, k))  
            
            extra = u''.join(extra)
        else:
            extra, options = '', ''

        final_attrs = self.build_attrs(attrs)
        html_code += super(AutocompleteWidget, self).render(name, self.choice or value, attrs)
        html_code += u"""
<script type="text/javascript"><!--
$(document).ready(function() {
    %s$('#%s').autocomplete(%s%s);
    });
--></script>
""" % (extra, final_attrs['id'], choices, options)

        return mark_safe(html_code)

    def set_current_choice(self, data):
        if not self.choices:
            raise ValueError('"choices" attribute was not defined yet.')

        for k, v in self.choices:
            if k == data:
                self.choice = v
                break

    def value_from_datadict(self, data, files, name):
        if not self.choices:
            return super(AutocompleteWidget, self).value_from_datadict(data, files, name)

        autocomplete_name = name + '_autocomplete'

        if not autocomplete_name in data:
            self.set_current_choice(data[name])
            return data[name]

        for k, v in self.choices:
            if v == data[autocomplete_name]:
                self.set_current_choice(k)
                return k

jQuery.autocomplete = function(input, options) {
	// Create a link to self
	var me = this;

	// Create jQuery object for input element
	var $input = $(input).attr("autocomplete", "off");

	// Apply inputClass if necessary
	if (options.inputClass) $input.addClass(options.inputClass);

	// Create results
	var results = document.createElement("div");
	// Create jQuery object for results
	var $results = $(results);
	$results.hide().addClass(options.resultsClass).css("position", "absolute");
	if( options.width > 0 ) $results.css("width", options.width);

	// Add to body element
	$("body").append(results);

	input.autocompleter = me;

	var timeout = null;
	var prev = "";
	var active = -1;
	var cache = {};
	var keyb = false;
	var hasFocus = false;
	var lastKeyPressCode = null;

	// flush cache
	function flushCache(){
		cache = {};
		cache.data = {};
		cache.length = 0;
	};

	// flush cache
	flushCache();

	// if there is a data array supplied
	if( options.data != null ){
		var sFirstChar = "", stMatchSets = {}, row = [];

		// no url was specified, we need to adjust the cache length to make sure it fits the local data store
		if( typeof options.url != "string" ) options.cacheLength = 1;

		// loop through the array and create a lookup structure
		for( var i=0; i < options.data.length; i++ ){
			// if row is a string, make an array otherwise just reference the array
			row = ((typeof options.data[i] == "string") ? [options.data[i]] : options.data[i]);

			// if the length is zero, don't add to list
			if( row[0].length > 0 ){
				// get the first character
				sFirstChar = row[0].substring(0, 1).toLowerCase();
				// if no lookup array for this character exists, look it up now
				if( !stMatchSets[sFirstChar] ) stMatchSets[sFirstChar] = [];
				// if the match is a string
				stMatchSets[sFirstChar].push(row);
			}
		}

		// add the data items to the cache
		for( var k in stMatchSets ){
			// increase the cache size
			options.cacheLength++;
			// add to the cache
			addToCache(k, stMatchSets[k]);
		}
	}

	$input
	.keydown(function(e) {
		// track last key pressed
		lastKeyPressCode = e.keyCode;
		switch(e.keyCode) {
			case 38: // up
				e.preventDefault();
				moveSelect(-1);
				break;
			case 40: // down
				e.preventDefault();
				moveSelect(1);
				break;
			case 9:  // tab
			case 13: // return
				if( selectCurrent() ){
					// make sure to blur off the current field
					$input.get(0).blur();
					e.preventDefault();
				}
				break;
			default:
				active = -1;
				if (timeout) clearTimeout(timeout);
				timeout = setTimeout(function(){onChange();}, options.delay);
				break;
		}
	})
	.focus(function(){
		// track whether the field has focus, we shouldn't process any results if the field no longer has focus
		hasFocus = true;
	})
	.blur(function() {
		// track whether the field has focus
		hasFocus = false;
		hideResults();
	});

	hideResultsNow();

	function onChange() {
		// ignore if the following keys are pressed: [del] [shift] [capslock]
		if( lastKeyPressCode == 46 || (lastKeyPressCode > 8 && lastKeyPressCode < 32) ) return $results.hide();
		var v = $input.val();
		if (v == prev) return;
		prev = v;
		if (v.length >= options.minChars) {
			$input.addClass(options.loadingClass);
			requestData(v);
		} else {
			$input.removeClass(options.loadingClass);
			$results.hide();
		}
	};

 	function moveSelect(step) {

		var lis = $("li", results);
		if (!lis) return;

		active += step;

		if (active < 0) {
			active = 0;
		} else if (active >= lis.size()) {
			active = lis.size() - 1;
		}

		lis.removeClass("ac_over");

		$(lis[active]).addClass("ac_over");

		// Weird behaviour in IE
		// if (lis[active] && lis[active].scrollIntoView) {
		// 	lis[active].scrollIntoView(false);
		// }

	};

	function selectCurrent() {
		var li = $("li.ac_over", results)[0];
		if (!li) {
			var $li = $("li", results);
			if (options.selectOnly) {
				if ($li.length == 1) li = $li[0];
			} else if (options.selectFirst) {
				li = $li[0];
			}
		}
		if (li) {
			selectItem(li);
			return true;
		} else {
			return false;
		}
	};

	function selectItem(li) {
		if (!li) {
			li = document.createElement("li");
			li.extra = [];
			li.selectValue = "";
		}
		var v = $.trim(li.selectValue ? li.selectValue : li.innerHTML);
		input.lastSelected = v;
		prev = v;
		$results.html("");
		$input.val(v);
		hideResultsNow();
		if (options.onItemSelect) setTimeout(function() { options.onItemSelect(li) }, 1);
	};

	// selects a portion of the input string
	function createSelection(start, end){
		// get a reference to the input element
		var field = $input.get(0);
		if( field.createTextRange ){
			var selRange = field.createTextRange();
			selRange.collapse(true);
			selRange.moveStart("character", start);
			selRange.moveEnd("character", end);
			selRange.select();
		} else if( field.setSelectionRange ){
			field.setSelectionRange(start, end);
		} else {
			if( field.selectionStart ){
				field.selectionStart = start;
				field.selectionEnd = end;
			}
		}
		field.focus();
	};

	// fills in the input box w/the first match (assumed to be the best match)
	function autoFill(sValue){
		// if the last user key pressed was backspace, don't autofill
		if( lastKeyPressCode != 8 ){
			// fill in the value (keep the case the user has typed)
			$input.val($input.val() + sValue.substring(prev.length));
			// select the portion of the value not typed by the user (so the next character will erase)
			createSelection(prev.length, sValue.length);
		}
	};

	function showResults() {
		// get the position of the input field right now (in case the DOM is shifted)
		var pos = findPos(input);
		// either use the specified width, or autocalculate based on form element
		var iWidth = (options.width > 0) ? options.width : $input.width();
		// reposition
		$results.css({
			width: parseInt(iWidth) + "px",
			top: (pos.y + input.offsetHeight) + "px",
			left: pos.x + "px"
		}).show();
	};

	function hideResults() {
		if (timeout) clearTimeout(timeout);
		timeout = setTimeout(hideResultsNow, 200);
	};

	function hideResultsNow() {
		if (timeout) clearTimeout(timeout);
		$input.removeClass(options.loadingClass);
		if ($results.is(":visible")) {
			$results.hide();
		}
		if (options.mustMatch) {
			var v = $input.val();
			if (v != input.lastSelected) {
				selectItem(null);
			}
		}
	};

	function receiveData(q, data) {
		if (data) {
			$input.removeClass(options.loadingClass);
			results.innerHTML = "";

			// if the field no longer has focus or if there are no matches, do not display the drop down
			if( !hasFocus || data.length == 0 ) return hideResultsNow();

			if ($.browser.msie) {
				// we put a styled iframe behind the calendar so HTML SELECT elements don't show through
				$results.append(document.createElement('iframe'));
			}
			results.appendChild(dataToDom(data));
			// autofill in the complete box w/the first match as long as the user hasn't entered in more data
			if( options.autoFill && ($input.val().toLowerCase() == q.toLowerCase()) ) autoFill(data[0][0]);
			showResults();
		} else {
			hideResultsNow();
		}
	};

	function parseData(data) {
		if (!data) return null;
		var parsed = [];
		var rows = data.split(options.lineSeparator);
		for (var i=0; i < rows.length; i++) {
			var row = $.trim(rows[i]);
			if (row) {
				parsed[parsed.length] = row.split(options.cellSeparator);
			}
		}
		return parsed;
	};

	function dataToDom(data) {
		var ul = document.createElement("ul");
		var num = data.length;

		// limited results to a max number
		if( (options.maxItemsToShow > 0) && (options.maxItemsToShow < num) ) num = options.maxItemsToShow;

		for (var i=0; i < num; i++) {
			var row = data[i];
			if (!row) continue;
			var li = document.createElement("li");
			if (options.formatItem) {
				li.innerHTML = options.formatItem(row, i, num);
				li.selectValue = row[0];
			} else {
				li.innerHTML = row[0];
				li.selectValue = row[0];
			}
			var extra = null;
			if (row.length > 1) {
				extra = [];
				for (var j=1; j < row.length; j++) {
					extra[extra.length] = row[j];
				}
			}
			li.extra = extra;
			ul.appendChild(li);
			$(li).hover(
				function() { $("li", ul).removeClass("ac_over"); $(this).addClass("ac_over"); active = $("li", ul).indexOf($(this).get(0)); },
				function() { $(this).removeClass("ac_over"); }
			).click(function(e) { e.preventDefault(); e.stopPropagation(); selectItem(this) });
		}
		return ul;
	};

	function requestData(q) {
		if (!options.matchCase) q = q.toLowerCase();
		var data = options.cacheLength ? loadFromCache(q) : null;
		// recieve the cached data
		if (data) {
			receiveData(q, data);
		// if an AJAX url has been supplied, try loading the data now
		} else if( (typeof options.url == "string") && (options.url.length > 0) ){
			$.get(makeUrl(q), function(data) {
				data = parseData(data);
				addToCache(q, data);
				receiveData(q, data);
			});
		// if there's been no data found, remove the loading class
		} else {
			$input.removeClass(options.loadingClass);
		}
	};

	function makeUrl(q) {
		var url = options.url + "?q=" + encodeURI(q);
		// fix situation when params is function
		var extraParams = {
				timestamp: +new Date()
			}; 
		$.each(options.extraParams, function(key, param) {
				extraParams[key] = typeof param == "function" ? param() : param;
			}); 
		for (var i in extraParams) {
			url += "&" + i + "=" + encodeURI(extraParams[i]);
		}
		return url;
	};

	function loadFromCache(q) {
		if (!q) return null;
		if (cache.data[q]) return cache.data[q];
		if (options.matchSubset) {
			for (var i = q.length - 1; i >= options.minChars; i--) {
				var qs = q.substr(0, i);
				var c = cache.data[qs];
				if (c) {
					var csub = [];
					for (var j = 0; j < c.length; j++) {
						var x = c[j];
						var x0 = x[0];
						if (matchSubset(x0, q)) {
							csub[csub.length] = x;
						}
					}
					return csub;
				}
			}
		}
		return null;
	};

	function matchSubset(s, sub) {
		if (!options.matchCase) s = s.toLowerCase();
		var i = s.indexOf(sub);
		if (i == -1) return false;
		return i == 0 || options.matchContains;
	};

	this.flushCache = function() {
		flushCache();
	};

	this.setExtraParams = function(p) {
		options.extraParams = p;
	};

	this.findValue = function(){
		var q = $input.val();

		if (!options.matchCase) q = q.toLowerCase();
		var data = options.cacheLength ? loadFromCache(q) : null;
		if (data) {
			findValueCallback(q, data);
		} else if( (typeof options.url == "string") && (options.url.length > 0) ){
			$.get(makeUrl(q), function(data) {
				data = parseData(data)
				addToCache(q, data);
				findValueCallback(q, data);
			});
		} else {
			// no matches
			findValueCallback(q, null);
		}
	}

	function findValueCallback(q, data){
		if (data) $input.removeClass(options.loadingClass);

		var num = (data) ? data.length : 0;
		var li = null;

		for (var i=0; i < num; i++) {
			var row = data[i];

			if( row[0].toLowerCase() == q.toLowerCase() ){
				li = document.createElement("li");
				if (options.formatItem) {
					li.innerHTML = options.formatItem(row, i, num);
					li.selectValue = row[0];
				} else {
					li.innerHTML = row[0];
					li.selectValue = row[0];
				}
				var extra = null;
				if( row.length > 1 ){
					extra = [];
					for (var j=1; j < row.length; j++) {
						extra[extra.length] = row[j];
					}
				}
				li.extra = extra;
			}
		}

		if( options.onFindValue ) setTimeout(function() { options.onFindValue(li) }, 1);
	}

	function addToCache(q, data) {
		if (!data || !q || !options.cacheLength) return;
		if (!cache.length || cache.length > options.cacheLength) {
			flushCache();
			cache.length++;
		} else if (!cache[q]) {
			cache.length++;
		}
		cache.data[q] = data;
	};

	function findPos(obj) {
		var curleft = obj.offsetLeft || 0;
		var curtop = obj.offsetTop || 0;
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
		return {x:curleft,y:curtop};
	}
}

jQuery.fn.autocomplete = function(url, options, data) {
	// Make sure options exists
	options = options || {};
	// Set url as option
	options.url = url;
	// set some bulk local data
	options.data = ((typeof data == "object") && (data.constructor == Array)) ? data : null;

	// Set default values for required options
	options.inputClass = options.inputClass || "ac_input";
	options.resultsClass = options.resultsClass || "ac_results";
	options.lineSeparator = options.lineSeparator || "\n";
	options.cellSeparator = options.cellSeparator || "|";
	options.minChars = options.minChars || 1;
	options.delay = options.delay || 400;
	options.matchCase = options.matchCase || 0;
	options.matchSubset = options.matchSubset || 1;
	options.matchContains = options.matchContains || 0;
	options.cacheLength = options.cacheLength || 1;
	options.mustMatch = options.mustMatch || 0;
	options.extraParams = options.extraParams || {};
	options.loadingClass = options.loadingClass || "ac_loading";
	options.selectFirst = options.selectFirst || false;
	options.selectOnly = options.selectOnly || false;
	options.maxItemsToShow = options.maxItemsToShow || -1;
	options.autoFill = options.autoFill || false;
	options.width = parseInt(options.width, 10) || 0;

	this.each(function() {
		var input = this;
		new jQuery.autocomplete(input, options);
	});

	// Don't break the chain
	return this;
}

jQuery.fn.autocompleteArray = function(data, options) {
	return this.autocomplete(null, options, data);
}

jQuery.fn.indexOf = function(e){
	for( var i=0; i<this.length; i++ ){
		if( this[i] == e ) return i;
	}
	return -1;
};

 objtype = forms.ChoiceField(label=_(u'label'), choices=OBJECTS_TYPE_LIST, required=False)
 object = forms.CharField(label=_(u'Full name'),
                                               widget=AutocompleteWidget(choices_url='autocomplete_field',
                                               options={
                                                        'onItemSelect':'selectItem', # название javascript функции которая вызивается при выборе элемента из выпавшего списка предложений автокоплита. В ней я и вытягиваю нужное id.
                                                        'minChars':'2' # минимальное количество набранных символов то процесса старта автокомплита
                                                        },
                                               related_fields=('complaint_object_type',)), required=False)

// If user select object
function selectItem(li) {
    if (!isNaN(li.extra[0])){
        alert (li.extra[1]); //id 
        alert (li.extra[0]); // текст
        return true;
    }
    return false;
}