I am trying to mimic the functionality of the right sidebar of this example for my Angular site.
I don't know what this is called, or even how to go about it on the front end or back end!
My assumption:
Create a form with values coming straight from the DB and only show the desired parameter (i.e. db.collection.find(query, {parameter: 1}) which will be called to update each time a user modifies the form. Additionally, the results would also be updated on selection (I have over 100MB of documents, returning ALL of them would be troublesome, how can I limit the number of documents returned to let's say 20 or 50 (user input?) and paginate it (1000 documents returned / 50 per page = 20 'pages')
Each input that is selected, a { 'field' : value } would be returned -- but I am not sure how to control an empty value (i.e. what if a user doesn't pick a fuel type or transmission range?)
How do I go about designing such a feature correctly?
1) In your query, use limit statement:
var options = { "limit": 20 }
collection.find({}, options).toArray(...);
2) you can validate user empty input (for eg. with express-validator):
req.checkBody('postparam', 'Invalid postparam').notEmpty()
req.getValidationResult().then(function(result) {
if (!result.isEmpty()) {
res.status(400).send('There have been validation errors: ' + util.inspect(result.array()));
return;
}
and based on result choose default value/pass error/render ask page for user
Related
sorry for the noob question and the wrong code.
I need that a gravity form field is populated with a different value depending on the amount entered by the user in a number field. Is possible?
I try this code but only with the first value does it work, how can I write it correctly?
add_filter( 'gform_field_value_custom_price', 'my_price' );
function my_price() {
$master = rgpost( `input_22`);
if ( $master < 51 ) {
return 0.80;
} elseif ( $master > 50 && < 201 {
return 0.60;
}
}
Thank you
Since you're populating static values, you could feasibly just create two different fields, each with their unique amount (0.80 or 0.60) and then use conditional logic on each field to show/hide the correct field dependent on the value entered in the Number field.
If the field you're attempting to populate is a Product field, you might consider Gravity Forms Conditional Pricing which would allow to change the price dynamically on a single field rather than requiring two different fields.
I've been having trouble figuring out how to have multiple intervals used on a page. Normally, this wouldn't be a problem but I'm working to create a dynamic countdown script which uses data submitted by the user and have to abide by a few rules:
I need the interval only to clear specifically for given element.
I only need the interval to clear if there currently is an interval set in that specific element.
My idea was to count each interval and assign the number instance to each one. So something like this :
function(element, data, api) {
let intervalIds = [];
for (var i=0; i < intervalIds.length; i++){
}
intervalIds.push(setInterval(function(){
console.log(intervalIds[i]);
clearInterval(intervalIds[i]-1);
//timecalculations after
}, 1000 ));
}
This worked at first, however when I refresh the page with multiple intervals, but after I refresh the page there is only one interval.
If the element ID is the same and a interval has been set for this element then clear the previous interval
If the element ID is different just simply start a new interval
P.S with the software I'm using I can access the element id using data.elementId. ex: if (data.elementId == data.elementId) { do stuff }
I found out the answer to this riddle.
You would need to create a dynamic variable. To do this you would either need to use eval() or assign the variable to the window scope. Then assign the interval to that variable.
Luckily, the software I work with assigns a unique Id to each element added to the page. So I can use this unique Id to assign it to the variable to create the dynamic va
For example:
//unique id
var dynamicIntervalID = $(element).attr('id');
//clear interval if one exists
if (window["intervalIds"+dynamicIntervalID])clearInterval(window["intervalIds"+dynamicIntervalID])
//assign unique element id to interval
window["intervalIds"+dynamicIntervalID] = setInterval(function(){
...code here..
}, 1000 );
Hope this helps.
I'm trying to create an android app which pulls first 1-10 documents in the mongodb collection and show those item in a list, then later when the list reaches the end i want to pull 11-20 documents in the mongodb collection and it goes on.
def get_all_tips(from_item, max_items):
db = client.MongoTip
tips_list = db.tips.find().sort([['_id', -1]]).limit(max_items).skip(from_item)
if tips_list.count() > 0:
from bson import json_util
return json_util.dumps(tips_list, default=json_util.default), response_ok
else:
return "Please move along nothing to see here", response_invalid
pass
But the above code does not work the way i intended but rather it returns from from_item to max_items
Example: calling get_all_tips(3,4)
It returns:
Document 3, Document 4, Document 5, Document 6
I'm expecting:
Document 3, Document 4
In your code you are specifying two parameters.
from_item: which is the starting index of the documents to return
max_items: number of items to return
Therefore calling get_all_tips(3,4) will return 4 documents starting from document 3 which is exactly what's happening.
Proposed fixes:
If you want it to return documents 3 and 4 call get_all_tips(3,2) instead, which means return a maximum of two documents starting from 3.
If you'd rather like to specify the start and end indexes in your function, I recommend the following changes:
def get_all_tips(from_item, to_item):
if to_item < from_item:
return "to_item must be greater than from item", bad_request
db = client.MongoTip
tips_list = db.tips.find().sort([['_id', -1]]).limit(to_item - from_item).skip(from_item)
That being said, I'd like to point out that MongoDb documentation does not recommend use of skip for pagination for large collections.
MongoDb 3.2 cursor.skip
I'm trying to get whether the product's stock status is instock/outofstock (Integers representing each state are fine. i don't necessarily need the "in stock"/"out of stock" strings per se).
I've tried various things to no avail.
1)
$inStock = $obj->get('Magento\CatalogInventory\Api\Data\StockItemInterface')->getisInStock()'
// Magento\CatalogInventory\Api\Data\StockItemInterface :: getisInStock returns true no matter what, even for 0qty products
// summary: not useful. How do you get the real one?
2)
$inStock = $obj->get('\Magento\CatalogInventory\Api\StockStateInterface')->verifyStock($_product->getId());
// test results for "verifyStock":
// a 0 qty product is in stock
// a 0 qty product is out of stock
// summary: fail. find correct method, with tests.
3)
$stockItemRepository = $obj->get('Magento\CatalogInventory\Model\Stock\StockItemRepository');
stockItem = $stockItemRepository->get($_product->getId());
$inStock = $stockItem->getIsInStock();
// Uncaught Magento\Framework\Exception\NoSuchEntityException: Stock Item with id "214"
// summmary: is stockitem not 1to1 with proudctid?
The weird thing is, getting stock quantities works just fine.
$availability = (String)$obj->get('\Magento\CatalogInventory\Api\StockStateInterface')->getStockQty($_product->getId(), $_product->getStore()->getWebsiteId());
So why isn't getIsInStock working?
This was one way I did it.
$stockItemResource = $obj->create('Magento\CatalogInventory\Model\ResourceModel\Stock\Item');
// grab ALL stock items (i.e. object that contains stock information)
$stockItemSelect = $stockItemResource->getConnection()->select()->from($stockItemResource->getMainTable());
$stockItems = $stockItemResource->getConnection()->fetchAll($stockItemSelect);
$inStock = null;
foreach($stockItems as $k => $item) {
if ($item['product_id'] == $_productId) {
$inStock = $item['is_in_stock'];
break; // not breaking properly. 'qz' still prints
}
}
Notes on efficiency:
I'm sure there are another ways to target the single item specifically, instead of getting all. Either through a method, or by adjusting the query passed in somehow.
But this method is probably more efficient for large n, avoiding the n+1 query problem.
You do still end up iterating through a lot, but perhaps theta(n) of iterating through a cached PHP variable is probably lower than n+1 querying the database. Haven't tested, just a hypothesis.
The returned structure is an array of arrays, where the sub-array (which also happens to be a stock item) has the product ID and the stock status value. And because the product ID and the stock status value is on the same level of nesting, we have no choice but to iterate through each sub-array to check the product_id, choose that sub-array, and grab the stock value. In short, we can't just utilize the hashmap, since the keys of the sub-array are not product IDs.
Ultimately, the efficiency of this depends on your use case. Rarely will you grab all stock items, unless doing mass exports. So the ultimate goal is to really just stay within the configured time limit is allowed for a request to persist.
Friends,
I have written the following JavaScript to ascertain which row of an tabular form the user is currently on. i.e. they have clicked a select list on row 4. I need the row number to then get the correct value of a field on this same row which I can then perform some further processing on.
What this JavaScript does is get the id of the triggering item, e.g. f02_0004 This tells me that the select list in column 2 of row 4 has been selected. So my Javascript gets just the row information i.e. 0004 and then uses that to reference another field in this row and at the moment just output the value to show I have the correct value.
<script language="JavaScript" type="text/javascript">
function cascade(pThis){
var row = getTheCurrentRow(pThis.id);
var nameAndRow = "f03_" + row;
var costCentre = $x(nameAndRow).value;
alert("the cost centre id is " + costCentre);
}
// the triggerItem has the name fxx_yyyy where xx is the column number and
// yyyy is the row. This function just returns yyyyy
function getTheCurrentRow(triggerItem){
var theRow = triggerItem.slice(4);
return theRow;
}
Whilst this works I can't help feeling that I must be re-inventing the wheel and that
either, there are built-in's that I can use or if not there maybe a "better" way?
In case of need I'm using Apex 4.0
Thanks in advance for any you can provide.
Well, what you have described is exactly what I typically do myself!
An alternative in Apex 4.0 would be to use jQuery to navigate the DOM something like this:
var costCentre = $(pThis).parents('tr').find('input[name="f03"]')[0].value;
I have tested this and it works OK in my test form.