My first post is here. I already explain my problem here and My output expected. Sir Guangyu Bai - MSFT commented my post, you check my post and scroll his answer. I apply his answer to my codes. The link is https://stackoverflow.com/questions/74587990/insert-data-to-firebase-and-set-restriction-to-uiusername-and-password-in-xama/74596335?noredirect=1#comment131744947_74596335.
This is how apply his code. My Username FIeld in UI
`
<Entry
Placeholder="Username"
TextColor="Black"
HorizontalOptions="FillAndExpand"
Margin="0,0,15,0"
PlaceholderColor="Black"
x:Name="entryField_Username"
TextChanged="entryField_Username_TextChanged"/>
` code behind under the textchanged..
`
async private void entryField_Username_TextChanged(object sender, TextChangedEventArgs e)
{
var oldText = e.OldTextValue;
var newText = e.NewTextValue;
// var newText = entryField_Username.Text;
CUSTOMER customer = new CUSTOMER();
// var person = await firebaseHelper.GetPerson(Convert.ToString(EntryText.Text);
var customerName = await customerRepo.GetCustomer(Convert.ToString(entryField_Username.Text));
//if (oldText != string.Empty)
//{
// if(await customerRepo.GetCustomer(Convert.ToString(entryField_Username.Text))
// {
// }
//}
if (customerName != null)
{
entryField_Username.Text = customer.CusFirstName;
// this is a Toast method
// await this.DependencyService.Get<Toast>().Show("Username Already Exist!");
await this.DisplayToastAsync("Username already exist.", 1500);
}
else
{
}
}
`
in my customerRepository file, One if the code or function is..
`
public async Task<List<CUSTOMER>> GetAllCustomer()
{
return (await firebaseClient
.Child("CUSTOMER")
.OnceAsync<CUSTOMER>()).Select(item => new CUSTOMER
{
CusFirstName = item.Object.CusFirstName,
CusID = item.Object.CusID
}).ToList();
}
public async Task<CUSTOMER> GetCustomer(string customerName)
{
// var data = await firebaseClient.Child(nameof(Customer)).PostAsync(JsonConvert.SerializeObject(customer));
//if (!string.IsNullOrEmpty(data.Key))
//{
// return true;
//}
//return false;
var allCustomer = await GetAllCustomer();
await firebaseClient
.Child("CUSTOMER")
.OnceAsync<CUSTOMER>();
return allCustomer.Where(a => a.CusFirstName == customerName).FirstOrDefault();
// var allCustomer = await firebaseClient.Child(nameof("Customer")).OnceAsync<Customer>
}
`
also in that customerRepository file, I set my firebaseclient with the link of my realtime database.
now, I flow is, when I enter the username of the user and hit "check" in the keyboard,just like the image I attached. The image is from google, I just editted it but thats the visual of what Im doing upon create. It will crash and ERROR WILL appear. that is the error :(
Please help me master how to solve the error and achieve my problem. Any link will be commented about my post, will be appreciated, Thank you.
EDIT; base on the user commented to my post, so I check my realtime database, and this is our rules `
{
"rules": {
"some_path": {
"$uid": {
// Allow only authenticated content owners access to their data
".read": "auth !== null && auth.uid === $uid",
".write": "auth !== null && auth.uid === $uid"
}
}
}
}
`
If we set the rules like that,we got this error..
Firebase.Database.FirebaseException: 'Exception occured while processing the request. Url: https://***************************************************************/.json?print=silent Request Data: {/*I comment this out,but this part is like my table property and its data */} Response: { "error" : "Permission denied" } '
