Is there any way to find an "item" inside an Dojo Store (Version 1.1!!).
The Format of the Json Data is like: name/id.
So far if tryed it with:
var storeItem = this.myFilteringSelect.store.fetch({query: {name: "Alpha"}});
But fetch does not return the item? Btw. i need the "ID" of the Item to set an default value for the filteringSelect (but the id can change from time to time...)
Let me preface my answer in that I can't speak to 1.1 specifically. But in 1.6...
store.fetch is coded in an asynchronous manner. It does not return the item. You must provide a callback that will iterate over the items returned from the query.
store.fetch({
query: {/*queryParams*/},
onComplete: function(items, findResult){
dojo.forEach(items, function(item){
// work with your item
}
}
});
https://dojotoolkit.org/reference-guide/1.6/dojo/data/api/Read.html#dojo-data-api-read
I don't believe this API had changed much over time, so if it is present in 1.1, then I think this should help.
Related
I am using jQrid version 3.8.1 with inline editing and each row in the grid has several dropdown lists to populate. When the user edits the row, I need to do an AJAX query to get the values for each of these lists. I've seen this post regarding how to do that. It appears that the dataUrl and buildSelect features are the standard answer here. There are a few issues I can't figure out though:
The row the user is editing has a value that must be passed into the dataUrl value. For example, say each row contains a field called "SpecialValue" and that for row 1, SpecialValue = 100. The dataUrl field for row 1 would be "http://my.services.com?SpecialValue=100". How do I do that?
Each row in the grid has about 10 select boxes that need to be populated. For efficiency reasons, I don't want to make 10 separate AJAX calls. It would be much better to make one call to get all the data, split it up, and fill each select box accordingly. Is that possible? I tried doing this inside onSelectRow but the grid ended up ignoring the values I put in there (I'm guessing do the ordering of the events that fire when you edit a row).
Edit:
After reading Oleg's answers and working on it more, it's clear to me that using dataUrl and buildSelect are not going to work well for me. The version of jqGrid I'm using doesn't support using dataUrl the way I would need. And even if it did I don't want to send multiple separate requests for each dropdown list.
I've decided to do one request when gridComplete fires to pull all the data needed for all dropdown lists into a single JSON structure. Then when the user selects a row to do inline editing, I will populate each list in the row from that JSON structure (the code below uses the getSelectValuesFromJSON() function for that--I don't give its definition but you can imaging it looks through the structure and gets an appropriate list of values to but in the list box).
I have a few candidate solutions but I'm not 100% happy with either one.
Solution 1:
Inside onSelectRow, I call editRow overriding the on oneditfunc to get the data out of the grid that I need. Assume that the value in Field1 is required to get the values to be put into the list in Field2.
onSelectRow: function (index, status, e) {
jQuery('#my_grid').jqGrid('editRow', index, true, function(rowId) {
var f1Val = $('#my_grid').jqGrid('getCell', index, 'Field1');
var selectVals = getSelectValuesFromJSON(f1Val); //gets data out of previously loaded JSON structure
var select = $('#my_grid').find('tr[id="' + index + '"] td[aria-describedby="my_grid_Field2"] select');
_.each(selectVals, function(selectVal) {
$(select).append($("<option></option>").attr("value", selectVal).text(selectVal));
});
});
}
This works but I'm hesitant about the line
var select = $('#my_grid').find('tr[id="' + index + '"] td[aria-describedby="my_grid_Field2"] select');
which relies on this aria-describedby attribute that I don't know much about. Seems hacky and brittle.
Solution 2:
Make use of beforeSelectRow to dynamically change the model of the Field2 column when the user selects a row.
beforeSelectRow: function(index, e) {
var f1Val = getGridCellValue('#my_grid', index, 'Field1');
var values = getSelectValuesFromJSON(f1Val); //gets data out of previously loaded JSON structure
var valStr = "";
_.each(values, function(value) {
valStr += value + ":" + value + ";"
});
jQuery('#grid_pipes').setColProp('Field2', { editoptions: { value: valStr } });
return true;
}
This also works but I'm not sure about whether or not this is really a good idea. Is it valid to dynamically change the model of a column like that? What if the user has several rows selected at the same time? Isn't there only one model for a column? What would that mean?
To answer some of Oleg's questions, the dataType has been set to a function that uses $.ajax to post data to the server. I think I read that's not the recommended approach anymore. I inherited this code so I'm not sure why it was done that way but it probably won't change unless there is a really compelling reason.
The loadonce boolean is not specified so I guess that means it defaults to false.
Here is an abbreviated version of the column model (nothing terribly out of the ordinary):
colModel: [
{ name: 'PK', index: 'PK', hidden: true, editable: true, sortable: true, search: true },
{ name: 'Field1', index: 'Field1', hidden: true, editable: true, sortable: true, search: true },
{ name: 'Field2', index: 'Field2', sortable: false, editable: true, search: false, edittype: "select", editoptions: {} },
{ name: 'Field3', index: 'Field3', sortable: false, editable: true, search: false, edittype: "select", editoptions: {} },
...
]
You don't wrote which version of jqGrid you use currently, but dataUrl can be defined as callback function with (rowid, value, name) parameters, which have to return the URL which you can build dynamically based on the information. The feature exist starting with v4.5.3 (see the line). You can use getCell, getRowData or getLocalRow inside of the callback to get the data from another columns of the row. Thus you can solve your first problem relatively easy.
You second question seems to me absolutely independent from the first one. It's better to separate such questions in different posts to allow the searching engine better to index the information and so to help other people to find it.
There are no simple way how to solve the second problem, but one can sure suggest a solution, but one have to know much more details what you do and how you do. How you start inline editing (do you use inlineNav, formatter: "actions" or you call editRow directly)? Which version of jqGrid (till version 4.7), free jqGrid or Guriddo jqGrid JS you use? How the columns with selects are defined in colModel? Which datatype you use and whether loadonce: true you use? I recommend you to post separate question with the information.
UPDATE: If you have to use old version of jqGrid then you can't generate dataUrl full dynamically, but because you need to add only SpecialValue=100" part to the URL you can follow the trick which I described in many my old answers (the first one was probably here, but the choice on property names which asked the user could be misunderstood). You can use ajaxSelectOptions.data which will define the data parameters of jQuery.ajax request. The problem only that you can define only one ajaxSelectOptions.data property. So you can add the following jqGrid option:
ajaxSelectOptions: {
data: {
SpecialValue: function () {
var rowid = $myGrid.jqGrid("getGridParam", "selrow");
return $myGrid.jqGrid("getCell", rowid, "SpecialValue");
}
}
}
($myGrid is something like $("#grid"))
UPDATED: You used unknown functions getSelectValuesFromJSON, getLookupValuesFromJSON in the updated part of your question. Both of there seems to use synchronous Ajax request which is not good. Moreover you set editoptions.value for only one Field2 instead of setting all selects.
onSelectRow: function (rowid) {
var $myGrid = $(this);
$.ajax({
url: "someUrl",
dataType: "json";
data: {
specialValue: $myGrid.jqGrid("getCell", rowid, "Field1")
},
success: function (data) {
// for example response data have format:
// { "Field2": ["v1", "v2", ...], "Field3": ["v3", "v4", ...] }
var filed, str;
for (filed in data) {
if (data.hasOwnProperty(filed)) {
str = $.map(data[filed], function (item) {
return item + ":" + item
}).join(";");
$myGrid.jqGrid("setColProp", filed, {
editoptions: {
value: str
}
});
}
}
$myGrid.jqGrid("editRow", rowid, true);
}
});
}
Nevertheless the "Solution 2" is more close to what I would recommend you. It's not really important whether to use onSelectRow or beforeSelectRow. You can make asynchronous Ajax request to the server which returns information for all select which you need. After you get the response from the server (inside of success callback) you can set editoptions.value for all selects and only then you can start editRow. In the way you will be sure that editing of the line will use row specific options in all select.
Some additional remarks. I recommend you to verify gridview: true option in the grid. Additionally I suspect that you fill the grid in not full correct way because you have hidden PK column and you use index instead of rowid as the first parameter of beforeSelectRow and onSelectRow. It's very important to understand that the current implementation of jqGrid always assign id attribute on every row (<tr> element) of the grid. So you have to provide id information in every item of input data. If you want to display the id information to the user (and so to have column in colModel with the primary key) then you should just include key: true property in the column definition. For example you can add key: true to the definition of PK column and so you will have rowid (or index in your case) with the same value like PK. It simplify many parts of code. For example jqGrid send id parameter in the editing request to the server. It's practical to have PK in the request. Moreover if you use repeatitems: false format of jsonReader the you can include id: "PK" in the jsonReader instead of having hidden PK column. It informs jqGrid to get rowid from PK. jqGrid will save PK in id attribute of <tr> and you will don't need to have additional <td style="display:none"> with the same information in the grid.
The last remark. I would strictly recommend you to update the retro version jqGrid 3.8.1 to some more recent version, for example to free jqGrid. Even if you would use no features (like Font Awesome for example) you will have performance advantages, and the look of modern web browsers will looks much better. You should understand the jqGrid 3.8.1 was tested with old (and slow jQuery 1.4.2). The version used with Internet Explorer 8 as the latest IE version (IE9 was published later in March 2011) and it's more oriented on IE6/IE7. The look in modern Chrome/Firefox/Safari can be bad. Is it what you want?
I just started using dgrid, and going through the dTunes sample, I'm unable to find the id associated with each row in the list. This is pretty remedial on my part, but how would I also get the id I sent from the datasource?
define([
'require',
'dgrid/List',
'dgrid/OnDemandGrid',
'dgrid/Selection',
'dgrid/Keyboard',
'dgrid/extensions/ColumnHider',
'dojo/_base/declare',
'dojo/_base/array',
'dojo/Stateful',
'dojo/when',
'dstore/RequestMemory',
'put-selector/put',
'dojo/domReady!'
], function (require, List, Grid, Selection,
Keyboard, Hider, declare, arrayUtil, Stateful,
when, RequestMemory, put) {
var cstsNode = put(listNode, 'div#cstsCars');
...
var cstsList = new TunesList({}, cstsNode);
var dataCSTS = new RequestMemory({ target: require.toUrl('./dataCSTS.json') });
...
dataCSTS.fetch().then(function (cars) {
cstsCars = arrayUtil.map(cars, pickField('Description'));
cstsCars.unshift('All (' + cstsCars.length + ' CSTS Cars' + (cstsCars.length !== 1 ? 's' : '') + ')');
cstsList.renderArray(cstsCars);
});
...
cstsList.on('dgrid-select', function (event) {
var row = event.rows[0];
console.log(row.id); // shows row number. How do I get the real id or other fields?
console.log(row.data); // shows row text that is displayed ("sample text 1")
console.log(row.data.id); // undefined
});
Here is a snippet of sample data like I'm supplying:
[{"id":"221","Description":"sample text 1"},
{"id":"222","Description":"sample text 2"},
{"id":"223","Description":"sample text 3"}]
I'd like to see the id. Instead, row.id returns 1,2 and 3, ie the row numbers (or id dgrid created?).
You haven't really shown a complete example, but given that you're using a store anyway, you'd have a much easier time if you let dgrid manage querying the store for you. If you use dgrid/OnDemandList (or dgrid/List plus dgrid/extensions/Pagination), you can pass your dataCSTS store to the collection property, it will render it all for you, and it will properly pick up your IDs (since Memory, and RequestMemory by extension, default to using id as their identity property).
The most appropriate place to do what you're currently doing prior to renderArray would probably be in the renderRow method if you're just using List, not Grid. (The default in List just returns a div with a text node containing whatever is passed to it; you'll be passing an object, so you'd want to dig out whatever property you actually want to display, first.)
If you want a header row, consider setting showHeader: true and implementing renderHeader. (This is false in List by default, but Grid sets it to true and implements it.)
You might want to check out the Grids and Stores tutorial.
I think the problem might be that I was modeling my code based on the dTunes sample code, which has 3 lists that behave a little differently than a regular grid.
For now, I'm using the cachingStore that is available in the lists. So the way I get the id:
cstsList.on('dgrid-select', function (event) {
var row = event.rows[0];
var id = storeCSTS.cachingStore.data[row.id - 1].id; // -1 because a header was added
console.log(id);
});
I'm not sure whether this will work if I ever try to do sorting.
I have a ctrl that pulls a json array from an API. In my code I have an ng-repeat that loops through results.
This is for a PhoneGap mobile app and I'd like to take a single element from the array so that I can use it for the page title.
So... I'm wanting to use 'tool_type' outside of my ng-repeat.
Thanks in advance - I'm just not sure where to start on this one.
Example json data
[{ "entry_id":"241",
"title":"70041",
"url_title":"event-70041",
"status":"open",
"images_url":"http://DOMAIN.com/uploads/event_images/241/70041__small.jpg",
"application_details":"Cobalt tool bits are designed for machining work hardening alloys and other tough materials. They have increased water resistance and tool life. This improves performance and retention of the cutting edge.",
"product_sku":"70041",
"tool_type": "Toolbits",
"sort_group": "HSCo Toolbits",
"material":"HSCo8",
"pack_details":"Need Checking",
"discount_category":"102",
"finish":"P0 Bright Finish",
"series_description":"HSS CO FLAT TOOLBIT DIN4964"},
..... MORE .....
Ctrl to call API
// Factory to get products by category
app.factory("api_get_channel_entries_products", function ($resource) {
var catID = $.url().attr('relative').replace(/\D/g,'');
return $resource(
"http://DOMAIN.com/feeds/app_productlist/:cat_id",
{
cat_id: catID
}
);
});
// Get the list from the factory and put data into $scope.categories so it can be repeated
function productList ($scope, api_get_channel_entries_products, $compile) {
$scope.products_list = [];
// Get the current URL and then regex out everything except numbers - ie the entry id
$.url().attr('anchor').replace(/\D/g,'');
$scope.products_list = api_get_channel_entries_products.query();
}
Angular works as following:
Forgiving: expression evaluation is forgiving to undefined and null, unlike in JavaScript, >where trying to evaluate undefined properties can generate ReferenceError or TypeError.
http://code.angularjs.org/1.2.9/docs/guide/expression
so you only need to write:
<title>{{products_list[0].tool_type}}</title>
if there is a zero element the title will be the tool_type, if not, there is no title.
Assuming you want to select a random object from the list to use something like this should work:
$scope.product-tool_type = products_list[Math.floor(Math.random()*products_list.length)].tool_type
Then to display the result just use
<h1>{{product-tool_type}}</h1>
Or alternatively:
<h1>{{products_list[Math.floor(Math.random()*products_list.length)].tool_type}}</h1>
This was originally posted on discuss.emberjs.com. See:
http://discuss.emberjs.com/t/what-is-the-proper-use-of-store-filter-store-find-for-infinite-scrolling/3798/2
but that site seems to get worse and worse as far as quality of content these days so I'm hoping StackOverflow can rescue me.
Intent: Build a page in ember with ember-data implementing infinite scrolling.
Background Knowledge: Based on the emberjs.com api docs on ember-data, specifically the store.filter and store.find methods ( see: http://emberjs.com/api/data/classes/DS.Store.html#method_filter ) I should be able to set the model hook of a route to the promise of a store filter operation. The response of the promise should be a filtered record array which is a an array of items from the store filtered by a filter function which is suppose to be constantly updated whenever new items are pushed into the store. By combining this with the store.find method which will push items into the store, the filteredRecordArray should automatically update with the new items thus updating the model and resulting in new items showing on the page.
For instance, assume we have a Questions Route, Controller and a model of type Question.
App.QuestionsRoute = Ember.Route.extend({
model: function (urlParams) {
return this.get('store').filter('question', function (q) {
return true;
});
}
});
Then we have a controller with some method that will call store.find, this could be triggered by some event/action whether it be detecting scroll events or the user explicitly clicking to load more, regardless this method would be called to load more questions.
Example:
App.QuestionsController = Ember.ArrayController.extend({
...
loadMore: function (offset) {
return this.get('store').find('question', { skip: currentOffset});
}
...
});
And the template to render the items:
...
{{#each question in controller}}
{{question.title}}
{{/each}}
...
Notice, that with this method we do NOT have to add a function to the store.find promise which explicitly calls this.get('model').pushObjects(questions); In fact, trying to do that once you have already returned a filter record array to the model does not work. Either we manage the content of the model manually, or we let ember-data do the work and I would very much like to let Ember-data do the work.
This is is a very clean API; however, it does not seem to work they way I've written it. Based on the documentation I cannot see anything wrong.
Using the Ember-Inspector tool from chrome I can see that the new questions from the second find call are loaded into the store under the 'question' type but the page does not refresh until I change routes and come back. It seems like the is simply a problem with observers, which made me think that this would be a bug in Ember-Data, but I didn't want to jump to conclusions like that until I asked to see if I'm using Ember-Data as intended.
If someone doesn't know exactly what is wrong but knows how to use store.push/pushMany to recreate this scenario in a jsbin that would also help too. I'm just not familiar with how to use the lower level methods on the store.
Help is much appreciated.
I just made this pattern work for myself, but in the "traditional" way, i.e. without using store.filter().
I managed the "loadMore" part in the router itself :
actions: {
loadMore: function () {
var model = this.controller.get('model'), route = this;
if (!this.get('loading')) {
this.set('loading', true);
this.store.find('question', {offset: model.get('length')}).then(function (records) {
model.addObjects(records);
route.set('loading', false);
});
}
}
}
Since you already tried the traditional way (from what I see in your post on discuss), it seems that the key part is to use addObjects() instead of pushObjects() as you did.
For the records, here is the relevant part of my view to trigger the loadMore action:
didInsertElement: function() {
var controller = this.get('controller');
$(window).on('scroll', function() {
if ($(window).scrollTop() > $(document).height() - ($(window).height()*2)) {
controller.send('loadMore');
}
});
},
willDestroyElement: function() {
$(window).off('scroll');
}
I am now looking to move the loading property to the controller so that I get a nice loader for the user.
I create dojox.grid.datagrid and I fill content from array like on example last example on page. During time, I change value of that array in code. How to refresh content of that grid ? How to load new data from changed array ?
To change values in the grid, you will need to change the value in the grid's store. The grid data is bound to the store data, and the grid will update itself as needed.
So the key is to understand Dojo's data api and how stores work in Dojo. Rather than manipulating the data directly in the grid, manipulate it in the store.
Ideally, the store is your array that you manipulate as the application runs and you should not be needing to sync the array to the grid. Just use the ItemFileWriteStore as your data holder unless thats not possible.
Also, using the dojo data identity api makes it much simple to find items in the grid if that is possible. Assuming you know when an item is updated, deleted, or changed in your application you should be able to modify the grid store as needed when the action happens. This is definitely the preferred approach. If you can't do that you will have to do a general fetch and use the onComplete callback to manually sync your arrays which will be very slow and won't scale well, in which case you may as well just create a new store all together and assign it to the grid with grid.setStore(myNewStore)
Here is a fiddle with a basic create, update, and delete operation: http://jsfiddle.net/BC7yT/11/
These examples all take advantage of declaring an identity when creating the store.
var store = new dojo.data.ItemFileWriteStore({
data: {
identifier : 'planet',
items: itemList
}
});
UPDATE AN EXISITNG ITEM:
//If the store is not in your scope you can get it from the grid
var store = grid.store;
//fetchItemByIdentity would be faster here, but this uses query just to show
//it is also possible
store.fetch({query : {planet : 'Zoron'},
onItem : function (item ) {
var humans = store.getValue(item, 'humanPop');
humans += 200;
store.setValue(item, 'humanPop', humans);
}
});
INSERT A NEW ITEM:
store.newItem({planet: 'Endron', humanPop : 40000, alienPop : 9000});
} catch (e) {
//An item with the same identity already exists
}
DELETE AN ITEM:
store.fetchItemByIdentity({ 'identity' : 'Gaxula', onItem : function (item ) {
if(item == null) {
//Item does not exist
} else {
store.deleteItem(item);
}
}});
The following code snippet can be used to update the grid:
var newStore = new dojo.data.ItemFileReadStore({data: {... some new data ...});
var grid = dijit.byId("gridId");
grid.setStore(newStore);
EDIT:
Dogo data grid reference guide (add/remove rows example, updating grid data examples )
(I suppose you already have a working grid and you want to completely change the grid's store)
Create a new datastore with your new value :
dataStore = new ObjectStore({ objectStore:new Memory({ data: data.items }) });
(data is the reponse from an ajax request for me)
Change your grid's store with the new one :
grid.store = dataStore;
Render :
grid.render();
This Will update Grid Store and refresh the View of the Grid in latest Version of Dojo 1.9
grid.store = store;
grid._refresh();
I had a server-side filtered EnhancedGrid, which was refreshing happily by changing the store, and shown in the other answers.
However I had another EnhancedGrid that would not refresh when a filter was applied. It may have been to do with the fact it was filtered client side (but data still coming from server using JsonRest store), but I don't really know the cause. Eitherway, the solution was to refresh with the following code:
grid.setFilter(grid.getFilter());
It's hacky and strange, but if it all else fails...
with this i can update a specifi row. this example is for a treegrid.
var idx = this.treeGrid.getItemIndex(item);
if(typeof idx == "string"){
this.treeGrid.updateRow(idx.split('/')[0]);
}else if(idx > -1){
this.treeGrid.updateRow(idx);
}