Users | Flutter SDK

Visit our Key Concepts page to get an overall understanding of the most important QuickBlox concepts.

Before you begin

Register a QuickBlox account. This is a matter of a few minutes and you will be able to use this account to build your apps.
Configure QuickBlox SDK for your app. Check out our Setup page for more details.
Create a user session to be able to use QuickBlox functionality. See our Authentication page to learn how to do it.

Create user

Create a user using the code snippet below. Only login (or email) and password are required. Other fields are optional.

String login = "chrispeterson";
String password = "superPassword";
String email = "[email protected]";
int blobId = 34253543;
int externalUserId = 2398734;
int facebookId = 2928734;
int twitterId = 92374392;
String fullName = "John Smith";
String phone = "+380772342381";
String webSite = "www.moo.com";
String customData = "";
String tagList = "";

try {
  QBUser? user = await QB.users.createUser(login, password, email, blobId: blobId, externalUserId: externalUserId, facebookId: facebookId, twitterId: twitterId, fullName: fullName, phone: phone, website: website, customData: customData, tagList: tagList);
} on PlatformException catch (e) {
  // Some error occurred, look at the exception message for more details
}

Argument	Required	Description
login	yes	User login.
password	yes	User password.
email	no	User email.
blobId	no	User blob ID.
externalUserId	no	User external ID.
facebookId	no	User facebook ID.
twitterId	no	User twitter ID.
fullName	no	User full name.
phone	no	User phone.
website	no	User website.
customData	no	User custom data.
tagList	no	User tag list.

Retrieve users

Get a list of users using the getUsers() method. The code snippet below shows how to get a list of users created between the two given dates, sorted in descending order, and limited to 100 users on the page.

try {
  QBFilter filter = QBFilter();
  filter.type = QBUsersFilterTypes.DATE;
  filter.field = QBUsersFilterFields.CREATED_AT;
  filter.operator = QBUsersFilterOperators.BETWEEN;
  filter.value = "2021-08-01T10:00:00Z, 2021-08-12T10:00:00Z";

  QBSort sort = QBSort();
  sort.field = QBUsersSortFields.CREATED_AT;
  sort.type = QBUsersSortTypes.DATE;
  sort.ascending = false;
  
  int page = 5;
  int perPage = 100;

  List<QBUser?> userList = await QB.users.getUsers(filter: filter, sort: sort, page: page, perPage: perPage);
} on PlatformException catch (e) {
    // Some error occurred, look at the exception message for more details
}

The method getUsers() accepts two (optional) arguments of the object type that can have the following fields:

Field	Required
filter	no	Specifies filtering criteria for the field.
sort	no	Specifies sorting criteria for the field.
page	no	Number of pages with results to be returned.
perPage	no	Number of records to return in one page.

If you want to retrieve only users updated after some specific date time, you can use operators. This is useful if you cache users somehow and do not want to obtain the whole list of your users on every app start. Thus, you can use search and sort operators to list users on the page so that it is easier to see specific users.

Search operators

You can use search operators to get more specific search results. The request below will return a list of users with a login other than the one specified.

try {
  QBFilter filter = QBFilter();
  filter.type = QBUsersFilterTypes.STRING;
  filter.field = QBUsersFilterFields.LOGIN;
  filter.operator = QBUsersFilterOperators.NE;
  filter.value = "admin";

  List<QBUser?> userList = await QB.users.getUsers(filter: filter);
} on PlatformException catch (e) {
    // Some error occurred, look at the exception message for more details
}

Here are the search operators that you can use to search for the exact data that you need.

Search operators	Applicable to types	Applicable to fields	Description
lt	number, string, date	id, created_at, updated_at, last_request_at, external_user_id, facebook_id	Less Than operator.
gt	number, string, date	id, created_at, updated_at, last_request_at, external_user_id, facebook_id	Greater Than operator.
ge	number, string, date	id, created_at, updated_at, last_request_at, external_user_id, facebook_id	Greater Than or Equal to operator.
le	number, string, date	id, created_at, updated_at, last_request_at, external_user_id, facebook_id	Less or Equal to operator
eq	number, string, date	id, full_name, email, login, phone, created_at, updated_at, last_request_at, external_user_id, facebook_id	Equal to operator.
ne	number, string, date	id, full_name, email, login, phone, created_at, updated_at, last_request_at, external_user_id, facebook_id	Not Equal to operator.
between	number, string, date	id, created_at, updated_at, last_request_at, external_user_id, facebook_id	Contained between values operator.
in	number, string, date	id, full_name, email, login, phone, created_at, updated_at, last_request_at, external_user_id, facebook_id	IN array operator.

Sort operators

You can use sort operators to order the search results. The request below will return a list of users with the login sorted in descending order.

try {
  QBSort sort = QBSort();
  sort.field = QBUsersSortFields.LOGIN;
  sort.type = QBUsersSortTypes.STRING;
  sort.ascending = false;

  List<QBUser?> userList = await QB.users.getUsers(sort: sort);
} on PlatformException catch (e) {
    // Some error occurred, look at the exception message for more details
}

Here are the sort options that you can use to order the search results:

Sort options	Applicable to types	Applicable to fields	Description
ascending	All types	id, full_name, email, login, phone, website, created_at, updated_at, last_request_at, external_user_id	Sort results in ascending order by setting the `ascending` as `true`.
descending	All types	id, full_name, email, login, phone, website, created_at, updated_at, last_request_at, external_user_id	Sort results in descending order by setting the `ascending` as `false`.

Retrieve users by tag

To get a list of users by tag for a current account, use the following code snippet.

List<String> tags = ["test"];
int page = 5;
int perPage = 100;

try {
  List<QBUser?> userList = await QB.users.getUsersByTag(tags, page: page, perPage: perPage
  );
} on PlatformException catch (e) {
  // Some error occurred, look at the exception message for more details
}

Argument	Required	Description
tags	yes	An array of tags. Min: 1.
page	no	Number of pages with results to be returned. Default: 1.
perPage	no	Number of records to return in one page. Min: 1. Default: 100.

Reset user password

📘
This feature is coming soon. Please check back later. For more updates and questions, feel free to contact our Customer Support Team.

Update user

Update a user profile by calling the updateUser() method. If you want to change your password, you need to provide 2 parameters: password and newPassword. The updated user entity will be returned. You can also update any other field of the user using the updateUser() method. Thus, the snippet below shows how to update a tagList and customData fields.

String login = "chrispeterson";
String customData = "";
String tagList = "tagOne, tagTwo";

try {
  var someObject = {};
  someObject["name"] = "John Smith";
  someObject["age"] = "31";
  someObject["city"] = "New York";
    
  String customData = json.encode(someObject);
  
  QBUser? user = await QB.users.updateUser(login, customData: customData, tagList: tagList);
} on PlatformException catch (e) {
  // Some error occurred, look at the exception message for more details
}

Argument	Required	Description
login	yes	User login.
customData	no	User custom data. Should be a String. You can convert any data types to String, for example, JSON, XML , etc.
tagList	no	User tags. A comma separated String without any spaces. A tag should contain alphanumeric characters and start with a letter. For example, the "tagOne" format is correct while the "tag one" format is incorrect. If more that 10 tags are provided, an error is returned: `tag list should contain maximum 10 tags`.

Set user avatar

To set a user avatar, just upload a file to the QuickBlox cloud storage and connect it to the user.

To upload the file to the QuickBlox cloud storage, call the upload() method and pass the imageFileUrl to it. The imageFileUrl is a path to the file in the device filesystem. Now that the file is uploaded, get the ID of the uploaded file.

To connect the file to the user, set the ID of the uploaded file to the blobId field of the user and call the updateUser() method. As a result, the user avatar gets updated.

String imageFileUrl = "content://data/image.jpg";
String login = "chrispeterson";
int blobId = 324987234;

try {
  QBFile? file = await QB.content.upload(imageFileUrl);
  if (file != null){
    int blobId = file!.id;
    QBUser? updatedUser = QB.users.updateUser(login, blobId: blobId);
  }
} on PlatformException catch (e) {
  // Some error occurred, look at the exception message for more details
}

Pass the following arguments to the updateUser() method:

Argument	Required	Description
userLogin	yes	User login.
blobId	no	User blob ID.

Get user avatar

Now, other users can get access to your avatar by calling the getPrivateURL() method. As a result, you will receive a private URL in the response. See this section to learn more about file URLs.

// get access to the avatar that was set in user's "blobId" property
int avatarFileId = user.blobId;

try {
  QBFile? file = await QB.content.getInfo(avatarFileId);
  if (file != null){
    String uid  = file!.uid;
    String? fileUrl = await QB.content.getPrivateURL(uid);
  }
} on PlatformException catch (e) {
  // Some error occurred, look at the exception message for more details
}