For more information about how Parse handles data, check out our documentation on Data. Without any URL parameters, this simply lists objects in the class:. There are several ways to put constraints on the objects found, using the where URL parameter. The value of the where parameter should be encoded JSON.
The simplest use of the where parameter is constraining the value for keys. The values of the where parameter also support comparisons besides exact matching. Instead of an exact value, provide a hash with keys corresponding to the comparisons to do.
The where parameter supports these options:. The query would look like:. In addition to where , there are several parameters you can use to configure what types of results are returned by the query. You can use the order parameter to specify a field to sort by. Prefixing with a negative sign reverses the order. Thus, to retrieve scores in ascending order:. You can sort by multiple fields by passing order a comma-separated list. To retrieve documents that are ordered by scores in ascending order and the names in descending order:.
You can use the limit and skip parameters for pagination. In the old Parse hosted backend, the maximum limit was 1,, but Parse Server removed that constraint. Thus, to retrieve objects after skipping the first You can restrict the fields returned by passing keys or excludeKeys a comma-separated list.
To retrieve documents that contain only the score and playerName fields and also special built-in fields such as objectId , createdAt , and updatedAt :. Or you may use excludeKeys to fetch everything except playerName :.
Most regular expression queries in Parse are heavily throttled due to performance considerations. Use case sensitive, anchored queries where possible. Queries that have regular expression constraints are very expensive, especially for classes with over , records.
Parse restricts how many such operations can be run on a particular app at any given time. By creating indexes on one or more columns your strings are turned into tokens for full text search functionality. Please refer to your database documentation on Full Text Search to setup your indexes, weights and limitations.
Mongo 3. Postgres 9. To use false automatically, please install Postgres Unaccent Extension and update your text search configuration. The text score signifies how well the string matched the search term s based on weights.
There are several ways to issue queries for relational data. For example, if each Comment has a Post object in its post field, you can fetch comments for a particular Post :.
For example, imagine you have Post class and a Comment class, where each Comment has a pointer to its parent Post. You can find comments on posts with images by doing:.
Imagine you have Post class and a Comment class, where each Comment has a pointer to its parent Post. You can find comments on posts without images by doing:.
Imagine you have a Post class and User class, where each Post can be liked by many users. In some situations, you want to return multiple types of related objects in one query. You can do this by passing the field to include in the include parameter. Instead of being represented as a Pointer , the post field is now expanded into the whole object.
For example, a Pointer to a Post could be represented as:. When the query is issued with an include parameter for the key holding this pointer, the pointer will be expanded to:. You can also do multi level includes using dot notation. You can issue a query with multiple fields included by passing a comma-separated list of keys as the include parameter. Note: In the old Parse hosted backend, count queries were rate limited to a maximum of requests per minute. They also returned inaccurate results for classes with more than 1, objects.
But, Parse Server has removed both constraints and can count objects well above 1, If you are limiting your query, or if there are a very large number of results, and you want to know how many total results there are without returning them all, you can use the count parameter. For example, if you only care about the number of games played by a particular player:. Since this requests a count as well as limiting to zero results, there will be a count but no results in the response.
For instance, if you want to find players with either have a lot of wins or a few wins, you can do:. Note that we do not, however, support GeoPoint or non-filtering constraints e. Can be used with where parameter for constraining the value for keys. You can find objects using aggregate functions. This will compute result s for a set of input values. Please replace with objectId. You can add or remove existing fields with project parameter. You can filter out objects with match parameter.
You can also constraint by limit , skip , sort. When using a MongoDB replica set, you can use the readPreference option to choose from which replica the objects will be retrieved.
You can also use the includeReadPreference option to choose from which replica the included pointers will be retrieved and the subqueryReadPreference option to choose in which replica the subqueries will run. The same rule applies for the subqueryReadPreference option. Many apps have a unified login that works across the mobile app and other systems.
In general, users have the same features as other objects, such as the flexible schema. The differences are that user objects must have a username and password, the password is automatically encrypted and stored securely, and Parse enforces the uniqueness of the username and email fields. Signing up a new user differs from creating a generic object in that the username and password fields are required. The password field is handled differently than the others; it is encrypted with bcrypt when stored in the Parse Cloud and never returned to any client request.
You can ask Parse to verify user email addresses in your application settings page. With this setting enabled, all new user registrations with an email field will generate an email confirmation at that address. You can check whether the user has verified their email with the emailVerified field. To sign up a new user, send a POST request to the users root. You may add any additional fields. For example, to create a user with a specific phone number:.
The response body is a JSON object containing the objectId , the createdAt timestamp of the newly-created object, and the sessionToken which can be used to authenticate subsequent requests as this user:. After you allow users to sign up, you need to let them log in to their account with a username and password in the future.
The response body is a JSON object containing all the user-provided fields except password. It also contains the createdAt , updatedAt , objectId , and sessionToken fields:.
Email verification adds the emailVerified field to the User object. Parse then emails the user a link which will set emailVerified to true. There are three emailVerified states to consider:. Note that a verification email will not be sent if the email has already been successfully verified. You can initiate password resets for users who have emails associated with their account. You can also retrieve the contents of a user object by sending a GET request to the URL returned in the location header when it was created.
For example, to retrieve the user created above:. It also contains the createdAt , updatedAt , and objectId fields:. The response matches the JSON object above for retrieving users. If the session token is not valid, an error object is returned:.
In normal usage, nobody except the user is allowed to modify their own data. To authenticate themselves, the user must add a X-Parse-Session-Token header to the request with the session token provided by the signup or login method.
For example, if we wanted to change the phone number for cooldude6 :. Without any URL parameters, this simply lists users:. All of the options for queries that work for regular objects also work for user objects, so check the section on Querying Objects for more details. You must provide the X-Parse-Session-Token header to authenticate. Parse allows you to link your users with services like Twitter and Facebook, enabling your users to sign up or log into your application using their existing identities.
This is accomplished through the sign-up and update REST endpoints by providing authentication data for the service you wish to link to a user in the authData field. Once your user is associated with a service, the authData for the service will be stored with the user and is retrievable by logging in.
In each case, you are responsible for completing the authentication flow e. OAuth 1. Learn more about Facebook login. Learn more about Twitter login.
Signing a user up with a linked service and logging them in with that service uses the same POST request, in which the authData for the user is specified. Parse then verifies that the provided authData is valid and checks to see if a user is already associated with this data.
If so, it returns a status code of OK and the details including a sessionToken for the user :. If the user has never been linked with this account, you will instead receive a status code of Created , indicating that a new user was created:. The body of the response will contain the objectId , createdAt , sessionToken , and an automatically-generated unique username.
Linking an existing user with a service like Facebook or Twitter uses a PUT request to associate authData with the user. For example, linking a user with a Facebook account would use a request like this:. After linking your user to a service, you can authenticate them using matching authData.
Unlinking an existing user with a service also uses a PUT request to clear authData from the user by setting the authData for the service to null. For example, unlinking a user with a Facebook account would use a request like this:.
For example, if you want the user with id "3KmCvT7Zsb" to have read and write access to an object, plus the object should be publicly readable, that corresponds to an ACL of:. If you want to access your data ignoring all ACLs, you can use the master key provided on the Dashboard. For backward compatibility, you can also do master-level authentication using HTTP Basic Auth, passing the application id as the username and the master key as the password.
For security, the master key should not be distributed to end users, but if you are running code in a trusted environment, feel free to use the master key for authentication. Sessions represent an instance of a user logged into a device. Sessions are automatically created when users log in or sign up. They are automatically deleted when users log out. We provide a set of APIs to manage Session objects in your app. A Session is a subclass of a Parse Object , so you can query, update, and delete sessions in the same way that you manipulate normal objects on Parse.
Arduino or Embedded C. Unlike other Parse objects, the Session class does not have Cloud Code triggers. So you cannot register a beforeSave or afterSave handler for the Session class. The Session object has these special fields:.
Apps created before March 25, use legacy session tokens until you migrate them to use the new revocable sessions. On API requests with legacy tokens, if the token is invalid e. User object was deleted , then the request is executed as a non-logged in user and no error was returned. This new behavior lets you know when you need to ask the user to log in again. With revocable sessions, your current session token could become invalid if its corresponding Session object is deleted from the Parse Cloud.
Sessions could also be deleted due to automatic expiration if configured in app settings. For mobile apps and websites, you should not create Session objects manually. The session token for this automatically-created session will be sent back on the login and signup response.
Querying for Session objects will only return objects belonging to the same user as your current session due to the Session ACL. You can also add a where clause to your query, just like normal Parse objects. When you have the session token, then you can delete its Session object by calling the logout endpoint:. If you want to delete another Session object for your user, and you have its objectId , you can delete it but not log yourself out by:.
X-Parse-Session-Token authenticates the request as the user that also owns session Axy98kq1B09 , which may have a different session token. You can only delete other sessions that belong to the same user. During IoT device provisioning, the phone typically does not know the installationId of the IoT device. The provisioning process typically goes like this:. Session objects can only be accessed by the user specified in the user field.
All Session objects have an ACL that is read and write by that user only. You cannot change this ACL. This means querying for sessions will only return objects that match the current logged-in user.
You cannot manually create an unrestricted sessions using the object creation API. Restricted sessions are prohibited from creating, modifying, or deleting any data in the User , Session , and Role classes.
Restricted session also cannot read unrestricted sessions. So it is still important for IoT devices to be in a safe physical environment and ideally use encrypted storage to store the session token. If you want to prevent restricted Sessions from modifying classes other than User , Session , or Role , you can write a Cloud Code beforeSave handler for that class:.
We recommend that you disable all CLPs not needed by your app. Here are some common use cases for Session CLPs:. As your app grows in scope and user-base, you may find yourself needing more coarse-grained control over access to pieces of your data than user-linked ACLs can provide.
To address this requirement, Parse supports a form of Role-based Access Control. Roles provide a logical way of grouping users with common access privileges to your Parse data. Roles are named objects that contain users and other roles. Any permission granted to a role is implicitly granted to its users as well as to the users of any roles that it contains.
By adding users to these roles, you can ensure that new users can be made moderators or administrators, without having to manually grant permission to every resource for each user. We provide a specialized role class to represent these groupings of users for the purposes of assigning permissions.
Roles have a few special fields that set them apart from other objects. Instead, roles may be managed by a separate interface on the web or manually managed by an administrator. Creating a new role differs from creating a generic object in that the name field is required.
Roles must also specify an ACL , which should be as restrictive as possible to avoid allowing the wrong users to modify a role. You can create a role with child roles or users by adding existing objects to the roles and users relations :.
You can also retrieve the contents of a role object by sending a GET request to the URL returned in the location header when it was created. For example, to retrieve the role created above:.
Note that the users and roles relations will not be visible in this JSON. Updating a role generally works like updating any other object , but the name field on the role cannot be changed. Adding and removing users and roles to the users and roles relations can be accomplished by using the AddRelation and RemoveRelation operators. Again, we pass the master key in order to bypass the ACL on the role itself.
Alternatively, we could pass an X-Parse-Session-Token for a user that has write access to the Role object e. In addition to per-user permissions as described above , you can also specify role-level permissions to your Parse objects. You can use role-level permissions alongside user-level permissions to provide fine-grained control over user access. As described above, one role can contain another, establishing a parent-child relationship between the two roles.
The consequence of this relationship is that any permission granted to the parent role is implicitly granted to all of its child roles. These types of relationships are commonly found in applications with user-managed content, such as forums.
Any user with Administrator privileges should also be granted the permissions of any Moderator. The request must contain the Content-Type header associated with the file. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. GetFullPathNameA function fileapi. Please rate your experience Yes No. Any additional feedback?
Note See the Remarks section for discussion of the use of relative paths with the GetFullPathName function in multithreaded applications or shared library code.
Note Although the return value in this case is a length that includes the terminating null character, the return value on success does not include the terminating null character in the count.
Note The fileapi. Also avoid these names followed immediately by an extension; for example, NUL. For more information, see Namespaces. Do not end a file or directory name with a space or a period.
Although the underlying file system may support such names, the Windows shell and user interface does not. However, it is acceptable to specify a period as the first character of a name. For example, ". When you create a long file name, Windows may also create a short 8. This 8. Not all file systems follow the tilde substitution convention, and systems can be configured to disable 8. Therefore, do not make the assumption that the 8. To request 8. This is true even if a long file name contains extended characters, regardless of the code page that is active during a disk read or write operation.
Files using long file names can be copied between NTFS file system partitions and Windows FAT file system partitions without losing any file name information. In this case, the short file name is substituted if possible. The path to a specified file consists of one or more components , separated by a special character a backslash , with each component usually being a directory name or file name, but with some notable exceptions discussed below.
It is often critical to the system's interpretation of a path what the beginning, or prefix , of the path looks like. This prefix determines the namespace the path is using, and additionally what special characters are used in which position within the path, including the last character. Each component of a path will also be constrained by the maximum length specified for a particular file system. In general, these rules fall into two categories: short and long.
Note that directory names are stored by the file system as a special type of file, but naming rules for files also apply to directory names. To summarize, a path is simply the string representation of the hierarchy between all of the directories that exist for a particular file or directory name. For Windows API functions that manipulate files, file names can often be relative to the current directory, while some APIs require a fully qualified path.
A file name is relative to the current directory if it does not begin with one of the following:. Improve this answer. LastIndexOf "someotherdir" ; The LastIndexOf will return the index within the string path where "someotherdir" is found.
That way substring will operate between 0 the start of the string and the index of "someotherdir" Hope this helps! Carlo M. I need to do that in a. Somehow I mis-read the question as being in C! Is this of help? Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.
0コメント