I would like to understand how the data.pageParams array works in useInfiniteQuery.
In general we always set a default value to 1. I would like to set a default value as the pagenumber that I receive as props and calculate the next page based on that.
The pageParams array in data always has the value as [undefined, 1, 2, 3...]
If I need to pass the custom page number how should this be done. Can the pageNumber be updated in the pageParams array
Is the pageParam a factor for fetching data from cache?
if you implement getNextPageParam, the pageParam will always be computed from that function. pageParams are only stored in case you use the manual approach - by passing a pageParam directly to fetchNextPage.
Related
I like to access a specific JSON object value, where the access path contains a dynamic value. The dynamic value is calculated beforehand during the dialog process.
How can I do this in a "set property" node? I did not find a good working approach.
Here my approach, which leads to no useful result.
=user.api_content.prediction.intents.${virtualagent.intent}.score
Thanks
Which language are you using? You should be able to just address it directly without a string designator. For example, here is how I get the score for the top intent, where intent is a variable property. You would just want to get it via the [] notation instead of the . notation.
var intent = LuisRecognizer.topIntent(recognizerResult);
if (recognizerResult.intents[intent].score < 0.5) {
intent = 'None';
}
I know they advice to get a cell value this way:
columnValue = vars.getObject("resultObject").get(0).get("Column Name");
as stated on jMeter doc : component reference : JDBC_Request.
But: How to access the same RS cell value by just a number of the column?
RS.get(0).get(4);
...instead of giving it a String of column Name/Label.
edit 1: Lets use Groovy/Java, instead of BeanShell. Thanks.
edit 2: The original motivation was the difference between column Name / Label, as these seem to be not fully guaranteed (? seems to be not clear here, not to me), especially due case-sensitivity ("id"/"ID", "name"/"Name"/"NAME" ..)
It should be something like:
String value = (new ArrayList<String>(vars.getObject("resultObject").get(0).values())).get(4)
More information: Debugging JDBC Sampler Results in JMeter
Be aware that according to HashMap documentation:
This class makes no guarantees as to the order of the map; in particular, it does not guarantee that the order will remain constant over time.
So the order of columns might be a big question mark.
The row itself is a HashMap, defined in source code as:
HashMap<String, Object> row
So using BeanShell syntax, you could get it as
row = vars.getObject("resultObject").get(0); // returns HashMap
In HashMap, you cannot access item (column) by ID. You could, however, apply one of the methods described here, but HashMap doesn't guarantee order, so you cannot be sure what "column 4" will contain.
If you want to be able to loop through all columns, it's better to do it in a Map style, not by index. For example using entrySet() with BeanShell:
for(Map.Entry entry : row.entrySet())
{
log.info(entry.getKey() + "=" + entry.getValue());
}
See various ways to iterate through Map here.
I want to make 3 dependents drop down list, each drop down dependent to the previous drop down, so when I select an item from first drop down , all data fetch from database and add to second drop down as item.
I know how to do this in a normal php page using ajax, but as opencart uses MVC I don't know how can I get the selected value
Basically, you need two things:
(1) Handling list changes
Add an event handler to each list that gets its selected value when it changes (the part that you already know), detailed tutorial here in case someone needed it
Just a suggestion (for code optimization), instead of associating a separate JS function to each list and repeating the code, you can write the function once, pass it the ID of the changing list along with the ID of the depending list and use it anywhere.
Your HTML should look like
<select id="list1" onchange="populateList('list1', 'list2')">
...
</select>
<select id="list2" onchange="populateList('list2', 'list3')">
...
</select>
<select id="list3">
...
</select>
and your JS
function populateList(listID, depListID)
{
// get the value of the changed list thorugh fetching the elment with ID "listID"
var listValue = ...
// get the values to be set in the depending list through AJAX
var depListValues = ...
// populate the depending list (element with ID "depListID")
}
(2) Populating the depending list
Send the value through AJAX to the appropriate PHP function and get the values back to update the depending list (the part you are asking for), AJAX detailed tutorial here
open cart uses the front controller design patter for routing, the URL always looks like: bla bla bla.bla/index.php?route=x/y/z&other parameters, x = folder name that contains a set of class files, y = file name that contains a specific class, z = the function to be called in that class (if omitted, index() will be called)
So the answer for your question is:
(Step 1) Use the following URL in your AJAX request:
index.php?route=common/home/populateList
(Step 2) Open the file <OC_ROOT>/catalog/controller/common/home.php , you will find class ControllerCommonHome, add a new function with the name populateList and add your logic there
(Step 3) To use the database object, I answered that previously here
Note: if you are at the admin side, there is a security token that MUST be present in all links along with the route, use that URL:
index.php?route=common/home/populateList&token=<?php echo $this->session->data['token'] ?> and manipulate the file at the admin folder not the catalog
P.S: Whenever the user changes the selected value in list # i, you should update options in list # i + 1 and reset all the following lists list # i + 2, list # i + 3 ..., so in your case you should always reset the third list when the first list value is changed
P.P.S: A very good guide for OC 1.5.x => here (It can also be used as a reference for OC 2.x with some modifications)
I would like to display the count of validation errors to my user.
It is to implement a message like "You have X error(s) left" next to the submit button.
Is there a way to do this ?
Edit :
I am using ember-validations 2.0.0-alpha.1 and ember 1.8.0 in the context of a controller (without ember data).
If I try the solution of Sam:
this.get('errors.length') // result is [], an empty array
The errors key holds an object, not an array. Each key of this object refers to a property on your model and points to an array of error messages, so you can do things like this.get('errors.firstName.length').
To find the total number of errors, you'd have to look through each of your model's properties and sum the number of errors for each one.
http://emberjs.jsbin.com/luzesiyeqi/1/
EDIT:
The .length property of the errors object is returning an empty array because of this code: https://github.com/dockyard/ember-validations/blob/master/addon/errors.js. Literally any key you access on the errors object will be initialized to an empty array.
EDIT 2:
Based on what you said in the comments about not wanting to loop through properties, you can do it in an alternative fashion by looking at the model's validators property. Check out this example:
numErrors: function () {
var errorCounts = this.get('model.validators').mapBy('errors.length');
return errorCounts.reduce(function (a, b) { return a + b }, 0);
}.property('model.validators.#each.length')
I've updated the JSBin, too:
http://emberjs.jsbin.com/jucuxodaga/1/edit?html,js,output
If you're using ember-validations, this will be easy: this.errors.length.
I know compact() is a standard php function. And set() is a cake-specific method.
I am running a simple test of passing a value to a view generated with ajax (user render() in my controller), and it only passes the value from the controller to the view if my setup is like so:
$variable_name_to_pass = "Passing to the view using set() can compact()";
$this->set(compact('variable_name_to_pass'));
From reading the manual, it appears set() should work along w/out compact.
Can anyone explain why set() will not work alone? Like
$this->set('variable_name_to_pass');
According to the CakePHP API:
Parameters:
mixed $one required
A string or an array of data.
mixed $two optional NULL
Value in case $one is a string (which then works as the key). Unused if $one is an associative array, otherwise serves as the values to $one's keys.
The compact function returns an associative array, built by taking the names specified in the input array, using them as keys, and taking the values of the variables referenced by those names and making those the values. For example:
$fred = 'Fred Flinstone';
$barney = 'Barney Rubble';
$names = compact('fred', 'barney');
// $names == array('fred' => 'Fred Flinstone', 'barney' => 'Barney Rubble')
So when you use compact in conjunction with set, you're using the single parameter form of the set function, by passing it an associative array of key-value pairs.
If you just have one variable you want to set on the view, and you want to use the single parameter form, you must invoke set in the same way:
$variable_to_pass = 'Fred';
$this->set(compact('variable_to_pass'));
Otherwise, the two parameter form of set can be used:
$variable_to_pass = 'Fred';
$this->set('variable_to_pass', $variable_to_pass);
Both achieve the same thing.
Compact returns an array. So, apparently set is checking it's parameters and if it's an array. It knows that it's from compact. If not it expects another parameter, the value of variable.