Introduction

This section shows the CRUD methods (Create, Read, Update and Delete) that you can use using the RESTful API. These methods will not work with the rest of the PYBOSSA endpoints, as that only support GET and POST actions.

Getting data

You can get a specific domain object by its id (by default any GET action will return only 20 objects, you can get more or fewer objects using the limit option):

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GET http://{pybossa-site-url}/api/{domain-object}/{id}[?api_key=API-KEY]

Note

Some GET actions may require to authenticate & authorize the request. Use the “?api_key” argument to pass the API-KEY.

If the object is not found you will get a JSON object like this:

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{
    "status": "failed",
    "action": "GET",
    "target": "project",
    "exception_msg": "404 Not Found",
    "status_code": 404,
    "exception_cls": "NotFound"
}

Any other error will return the same object but with the proper status code and error message.

Filtering the data

You can get a list of domain objects by its fields. You will use the objects attributes to filter the query, as it will return only objects matching it:

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GET http://pybossa-site-url/api/{domain-object}[?domain-object-field=value]

Multiple fields can be used separated by the & symbol:

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GET http://pybossa-site-url/api/{domain-object}[?field1=value&field2=value2]

It is possible to limit the number of returned objects:

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GET http://{pybossa-site-url}/api/{domain-object}[?field1=value&limit=20]

It is possible to access first level JSON keys within the info field of Categories, Projects, Tasks, Task Runs and Results:

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GET http://{pybossa-site-url}/api/{domain-object}[?field1=value&info=foo::bar&limit=20]

To search within the first level (nested keys are not supported), you have to use the following format:

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info=key::value

For adding more keys:

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info=key1::value1|key2::value2|keyN::valueN

These parameters will be ANDs, so, it will return objects that have those keys with and and operator.

Your data first

The API understands who is requesting the data. When you are using your API key to authenticate your calls, the system will return only your data. For instance, if you request all the projects, you will only get your projects and the rest (owned by other users will be hidden). You can get access to all the projects, tasks, and task runs (the whole database) using the parameter: all=1.

For example, if an anonymous user accesses the generic API endpoints like:

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GET http://{pybossa-site-url}/api/project

It will return all the projects from the DB, ordering them by ID. If you access it like authenticating yourself:

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GET http://{pybossa-site-url}/api/project?api_key=YOURKEY

Then, you will get your projects. In other words, the projects that you own. If you don’t have a project, but you want to explore the API then you can use the all=1 argument:

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GET http://{pybossa-site-url}/api/project?api_key=YOURKEY&all=1

This call will return all the projects from the DB ordering by ID.

For example, you can get a list of your Projects like this:

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GET http://{pybossa-site-url}/api/project
GET http://{pybossa-site-url}/api/project?api_key=YOURKEY
GET http://{pybossa-site-url}/api/project?api_key=YOURKEY&all=1

Or a list of available Categories:

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GET http://{pybossa-site-url}/api/category

Or a list of Tasks:

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GET http://{pybossa-site-url}/api/task
GET http://{pybossa-site-url}/api/task?api_key=YOURKEY
GET http://{pybossa-site-url}/api/task?api_key=YOURKEY&all=1

For a list of TaskRuns use:

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GET http://{pybossa-site-url}/api/taskrun
GET http://{pybossa-site-url}/api/taskrun?api_key=YOURKEY
GET http://{pybossa-site-url}/api/taskrun?api_key=YOURKEY&all=1

Using date ranges

If you want, you can use the domain attribute created to get items from the DB. You can specify a year, year-month, year-month-day to get all the values for those ranges. For example, if you want all the tasks that have been created in 2015, just use:

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GET http://{pybossa-site-url}/api/task?created=2015&all=1

If you want all the task runs from 2015-05:

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GET http://{pybossa-site-url}/api/taskrun?created=2015-05&all=1

You can, for example, get all the task runs that a user has submitted on a given day like this:

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GET http://{pybossa-site-url}/api/taskrun?created=2015-05-03&user_id=3

This filter works for any object that has the created attribute.

Order by

Any query can be ordered by an attribute of the domain object that you are querying. For example, you can get a list of tasks ordered by ID:

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GET http://{pybossa-site-url}/api/task?orderby=id

If you want, you can order them in descending order:

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GET http://{pybossa-site-url}/api/task?orderby=id&desc=true

Check all the attributes that you can use to order by in the Domain Object section.

Note

Please, notice that to keep users privacy, only their locale and nickname will be shared by default. Optionally, users can disable privacy mode in their settings. By doing so, also their full name and account creation date will be visible for everyone through the API.

Limit

By default, PYBOSSA limits the list of items to 20. If you want to get more items, use the keyword limit=N with N being a number to get that amount. There is a maximum of 100 to the limit keyword, so if you try to get more items at once, it won’t work.

Pagination

You can paginate the results of any GET query using the last ID of the domain object that you have received and the parameter: last_id. For example, to get the next 20 items after the last project ID that you’ve received, you will write the query like this:

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`GET /api/project?last_id=N.

Pagination with offset and limit

DEPRECATED (see next Note for a better and faster solution) You can use the keyword offset=N in any GET query to skip that many rows before beginning to get rows. If both offset and limit appear, then offset rows are skipped before starting to count the limit rows that are returned.

For Tasks, TaskRuns, and Results you can get the associated data using the argument: related=True.

This flag will allow you to get in one call all the TaskRuns and Result for a given task. You can do the same for a TaskRun getting the Task and associated Result, and for a Result getting all the TaskRuns and associated Task.

Projects do not have this feature, as it will be too expensive for the API.

Create

Create a domain object. Returns created domain object.:

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POST http://{pybossa-site-url}/api/{domain-object}[?api_key=API-KEY]

Note

Some POST actions may require to authenticate & authorize the request. Use the ?api_key argument to pass the API-KEY.

If an error occurs, the action will return a JSON object like this:

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{
    "status": "failed",
    "action": "POST",
    "target": "project",
    "exception_msg": "type object 'Project' has no attribute 'short_ame'",
    "status_code": 415,
    "exception_cls": "AttributeError"
}

Where target will refer to a Project, Task or TaskRun object.

Update

Update a domain object:

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PUT http://{pybossa-site-url}/api/{domain-object}/{id}[?api_key=API-KEY]

Note

Some PUT actions may require to authenticate & authorize the request. Use the ?api_key argument to pass the API-KEY.

If an error occurs, the action will return a JSON object like this:

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{
    "status": "failed",
    "action": "PUT",
    "target": "project",
    "exception_msg": "type object 'Project' has no attribute 'short_ame'",
    "status_code": 415,
    "exception_cls": "AttributeError"
}

Where target will refer to a project, Task or TaskRun object.

Delete

Delete a domain object:

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DELETE http://{pybossa-site-url}/api/{domain-object}/{id}[?api_key=API-KEY]

Note

Some DELETE actions may require to authenticate & authorize the request. Use the ?api_key argument to pass the API-KEY.

If an error occurs, the action will return a JSON object like this:

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{
    "status": "failed",
    "action": "DELETE",
    "target": "project",
    "exception_msg": "type object 'Project' has no attribute 'short_ame'",
    "status_code": 415,
    "exception_cls": "AttributeError"
}

Where target will refer to a Project, Task or TaskRun object.