how to delete randomly generated id into sub node in firebase [closed] - firebase

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{
"likes" : {
"-K_4PuiqVo6BsIsL0tMD" : {//post reference id
"-K_4Pv_JXQHW_LoDNUJY" : {//'like' id(randomely generated)
"id" : "TYS111088",
"photoUrl" : "https://web.smm:8081/Emp_Images/Upload/Emp_Photo/t_TYS111088-c22cbe899f.JPG",
"username" : "Anubhav"
},
"-K_4QP-lGvH9K2cljSIh" : {//'like' id(randomely generated)
"id" : "TYS111088",
"photoUrl" : "https://web.smm:8081/t_TYS111088-c22cbe899f.JPG",
"username" : "Anubhav"
}
}
}
I want to delete particular 'like'id node(with details),on click of dislike button. I am using android app.

We don't know the platform but the answer is very similar
let ref = myRootRef.child("likes")
.child("-K_4Fbj0wBmZf3_l-uXe")
.child("-K_4FdjaJgPoR0EGwexB")
ref.removeValue()
you can also delete data by setting using ref.setValue and setting it to nil.

I think that you have structured your data wrongly. You want to use on("child_added") on "likes". Once you have all childs,
you want to delete a child via user input (e.g. you have a delete button with the referense to the current key)
When storing: ref("likes").push()
When retrieving: ref("likes").on("child_added")

In the data viewer (what you're looking at) you can hover over a node and you'll have the ability to add a new child (green + button) or delete the node (red X button).

Related

How to solve key issue of API [closed]

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Hi I try to call some data using API but it shows error message of "invalid key". But In the function I didn't figure out where I can input my key. The code is shown below:
sahie_years <- getCensus(
name = "timeseries/healthins/sahie",
vars = c("NAME", "PCTUI_PT"),
region = "state:01",
time = "from 2006 to 2018")
head(sahie_years)
Can anybody have some ideas?
See documentation here for setting up your API key.
You need to sign up for an API key here.
Once you've done that you can either specify your API key by setting an environment variable using Sys.setenv(CENSUS_KEY="YOUR_CENSUS_KEY_GOES_HERE"), or
just set it directly in your getCensus call by adding the argument key = "YOUR_CENSUS_KEY_GOES_HERE".
For API keys in general, it is often easiest to set them in a .Renviron file, which will make them available in each session using Sys.getenv.

Firebase Database Update creating duplicate node [closed]

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I have a users object, in that I am trying to update a specific node(status) by using the firebase update(payload) method. But when I try to do that, instead of updating the value in the parent node, it creates a new child node(duplicate node) with the value being updated there.
let firebaseApp = firebase.initializeApp(firebaseConfig);
let uniqueID = "OEHCrSnKFrd87JDivvA0sLMnj8u1"
firebaseApp.database()ref("users/" + uniqueID).update({
status: false
})
Duplicate node image
On .update() you have to specify the path for the key.
try the following:
let firebaseApp = firebase.initializeApp(firebaseConfig);
let uniqueID = "OEHCrSnKFrd87JDivvA0sLMnj8u1"
let updates = {};
updates["/status"] = false;
firebaseApp.database()ref("users/" + uniqueID).update(updates)

is there any woocommerce API for add To cart [closed]

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Is there any woocommerce API for add to cart
So that I can add product to cart via mobile app.
Please help me.
Did not found any "add to cart" functionality in the woocommerce api.
What had been done is that my "add to cart" button will save the product id and its quantity(and other properties) to the shared preferences object.
Firstly getting the products json object from the already shared preferences object and find out that the to-be-added product already is present on the shared preferences object.If it is present already then the execution returns.Otherwise it will advance to add the product property to the shared preferences object.
SharedPreferences pref = getSharedPreferences("CartPref", 0);
String strJson = pref.getString("productCartJson","[]");
JSONArray productsSaveDetailJsonArray = new JSONArray(strJson);
//checking if the product-to-be-added is already present in the shared preferences object
for(int i=0;i<productsSaveDetailJsonArray.length();i++){
if(productsSaveDetailJsonArray.getJSONObject(i).getString("product_id").contentEquals(productIdForDetailsPage)){
strJson = pref.getString("productCartJson","0");
Log.d("strJson",""+strJson);
//if already present then returns.
return;
}
}
JSONObject productSaveDetailJsonObject = new JSONObject();
productSaveDetailJsonObject.put("product_id",""+productIdForDetailsPage);
productSaveDetailJsonObject.put("quantity","1");
productsSaveDetailJsonArray.put(productSaveDetailJsonObject);
SharedPreferences.Editor editor = pref.edit();
editor.putString("productCartJson", ""+productsSaveDetailJsonArray);
editor.apply();
strJson = pref.getString("productCartJson","0");
Log.d("strJson",""+strJson);
If any doubt please comment.
This works for me.Hope it works for you as well.
Please find the following steps to achieve this:
Get the persistent cart. It may be _woocommerce_persistent_cart or _woocommerce_persistent_cart_1; check in the user_meta table.
Create a new cart object.
Add the old cart data to the newly created cart object.
Add the product and quantities coming in from the request to the new cart object.
If there is a current session cart, overwrite it with the new cart.
Update the wp_session table with the updated cart data.
Overwrite the persistent cart with the new cart data.
Please check my answer to the following question with integration of these steps in working code:
Rest API to store products in cart based on the user id in woocommerce

How to trying to avoid message from device if The message is same [closed]

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How to try to use ban message from device if The message is same .
I want to get message from device like "OK" While it is connect . Then it will respond to me message "OK" . Device permenently send me message "OK" after send new message. How can I avoid this message.
var list = new List<string>();
...
// in the loop or other repeating code
list.Add("OK");
...
// at the end of code
var summary = string.Join(". ", list.ToArray());
gotNewmesage(summary);
Istead of showing a message directly, collect all messages and show them at the end of the action/method.
Example:
var list = new List<string>();
...
// in the loop or other repeating code
list.Add("OK");
...
// at the end of code
var summary = string.Join(". ", list.ToArray());
gotNewmesage(summary);
If you want to avoid duplicates, check it before adding a message, for example
if (!list.Contains("OK"))
list.Add("OK");

Wordpress; if user exists auto change username [closed]

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I am coding a custom register page for my wordpress site. I am actually hiding the WP registering/member function a bit. This means that people fill in their info, automatically a username is created (combination first + lastname), auto a password is created, and people get logged in automatically. No confirmation e-mail is sent, so people are not aware that they actually created an account and are logged in. Now i have 2 questions:
I was wondering if it would be possible that if a username already exists, people get logged in automatically, for instance by updating all the fields (including password) and log in the user.
If that is not possible (I guess it is not); would it be possible that when the username exists, automatically the username is changed to a combination of: firstname, lastname+number. So: Peter Hanks, Peter Hanks 1, Peter hanks 2 etc. when a username exists?
Hope someone can help me out on this.
Thanks a lot!
You can update the password with wp_set_password
http://codex.wordpress.org/Function_Reference/wp_set_password
After that, you can auto login with wp_signon
http://codex.wordpress.org/Function_Reference/wp_signon
Example (Not tested)
wp_set_password($new_password);
$creds = array();
$creds['user_login'] = $username;
$creds['user_password'] = $new_password;
wp_signon( $creds, false );

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