Class: Jamf::CollectionResource Abstract

Inherits:
Resource show all
Extended by:
BaseClass, Filterable, Pageable, Sortable
Includes:
Comparable
Defined in:
lib/jamf/api/base_classes/collection_resource.rb

Overview

This class is abstract.

A Collection Resource in Jamf Pro

See Resource for general info about API resources.

Collection resources have more than one resource within them, and those can (usually) be created and deleted as well as fetched and updated. The entire collection (or a part of it) can also be retrieved as an Array. When the whole collection is retrieved, the result may be cached for future use.

# Subclassing

## Creatability, & Deletability

Sometimes the API doesn’t support creation of new members of the collection. If that’s the case, just extend the subclass with Jamf::UnCreatable and the ‘.create’ class method will raise an error.

Similarly for deletion of members: if the API doesn’t have a way to delete them, extend the subclass with Jamf::UnDeletable

See also Jamf::JSONObject, which talks about extending subclasses with Jamf::Immutable

## Bulk Deletion

Some collection resources have a resource for bulk deletion, passing in a JSON array of ids to delete.

If so, just define a BULK_DELETE_RSRC, and the .delete class method will use it, rather than making multiple calls to delete individual items. See Jamf::Category::BULK_DELETE_RSRC for an example

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from Jamf::JSONObject

Class Method Details

.all(sort: nil, filter: nil, paged: nil, page_size: nil, refresh: false, instantiate: false, cnx: Jamf.cnx) ⇒ Array<Hash, Jamf::CollectionResource>

Get all instances of a CollectionResource, possibly limited by a filter.

When called without specifying paged:, sort:, or filter: (see below) this method will return a single Array of all items of its CollectionResouce subclass, in the server’s default sort order. This full list is cached for future use (see Caching, below)

However, the Array can be sorted by the server, filtered to contain only matching objects, or ‘paged’, i.e. retrieved in successive Arrays of a certain size.

Sorting, filtering, and paging can all be used at the same time.

#### Server-side Sorting

Sorting criteria can be provided in the String format ‘property:direction’, where direction is ‘asc’ or ‘desc’ E.g.

"username:asc"

Multiple properties are supported, either as separate strings in an Array, or a single string, comma separated. E.g.

"username:asc,timestamp:desc"

is the same as

["username:asc", "timestamp:desc"]

which will sort by username alphabetically, and within each username, sort by timestamp newest first.

Please see the JamfPro API documentation for the resource for details about available sorting properties and default sorting criteria

#### Filtering

Some CollectionResouces support RSQL filters to limit which objects are returned. These filters can be applied using the filter: parameter, in which case this ‘all` method will return `all that match the filter`.

If the resource doesn’t support filters, the filter parameter is ignored.

Please see the JamfPro API documentation for the resource to see if filters are supported, and a list of available fields.

#### Paging

To reduce server load and local memory usage, you can request the results in ‘pages’, i.e. successivly retrieved Arrays, using the paged: and page_size: parameters.

When paged: is truthy, the call to ‘all` returns the first group of objects containing however many are specified by page_size: The default page size is 100, the minimum is 1, and the maximum is 2000.

Once you have made a paged call to ‘all`, you must use the `next_page_of_all` method to get the next Array of objects. That method merely repeats the last request made by `all` after incrementing the page number by 1. When `next_page_of_all` returns an empty array, you have retrieved all availalble objects.

‘next_page_of_all` always reflects the last paged call to `all`. Any subsequent paged call to `all` will reset the paging process for that collection class, and any unfinished previous paged calls to `all` will be forgotten

#### Instantiation

All data from the API comes from the server in JSON format, mostly as JSON ‘objects’, which are the equivalent of ruby Hashes. When fetching an individual instance of an object from the API, ruby-jss uses the JSON Hash to create the ruby object, i.e. to ‘instantiate’ it as an instance of its class. Doing this for many objects can slow things down.

Because of this, the ‘all’ method defaults to returning an Array of the minimally-processed JSON Hashes it gets from the API. If you can get your desired data from these Hashes, it’s far more efficient to do so.

However sometimes you really need the fully instantiated ruby objects for all of them - especially if you’re using filters and not actually processing all items of the class. In such cases you can pass a truthy value to the instantiate: parameter, and the Array will contain fully instantiated ruby objects, not Hashes of API data.

#### Caching

When called without specifying paged:, sort:, or filter: this method will return a single Array of all items of its CollectionResouce subclass, in the server’s default sort order.

This Array is cached in ruby-jss, and future calls to this method without those parameters will return the cached Array. Use ‘refresh: true` to re-request that Array from the server. Note that the cache is of the raw JSON Hash data. Using ’instantiate:‘ will still be slower as each item in the cache is instantiated. See ’Instantiation’ above.

Some other class methods, e.g. .all_names, will generate or use this cached Array to derive their values.

If any of the parameters paged:, sort:, or filter: are used, an API request is made every time, and no caches are used or stored.

Parameters:

  • sort (String, Array<String>) (defaults to: nil) —

    Server-side sorting criteria in the format: property:direction, where direction is ‘asc’ or ‘desc’. Multiple properties are supported, either as separate strings in an Array, or a single string, comma separated.

  • filter (String) (defaults to: nil) —

    An RSQL filter string. Not all collection resources currently support filters, and if they don’t, this will be ignored.

  • paged (Boolean) (defaults to: nil) —

    Defaults to false. Returns only the first page of ‘page_size` objects. Use next_page_of_all to retrieve each successive page.

  • page_size (Integer) (defaults to: nil) —

    How many items are returned per page? Minimum is 1, maximum is 2000, default is 100. Ignored unless paged: is truthy. Note: the final page may contain fewer items than the page_size

  • refresh (Boolean) (defaults to: false) —

    re-fetch and re-cache the full list of all instances. Ignored if paged:, page_size:, sort:, filter: or instantiate: are used.

  • instantiate (Boolean) (defaults to: false) —

    Defaults to false. Should the items in the returned Array(s) be ruby instances of the CollectionObject subclass, or plain Hashes of data as returned by the API?

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    The API connection to use, default: Jamf.cnx

Returns:



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 216

def self.all(sort: nil, filter: nil, paged: nil, page_size: nil, refresh: false, instantiate: false, cnx: Jamf.cnx)
  stop_if_base_class

  # use the cache if not paging, filtering or sorting
  return cached_all(refresh, instantiate, cnx) if !paged && !sort && !filter

  # we are sorting, filtering or paging
  sort = parse_collection_sort(sort)
  filter = parse_collection_filter(filter)

  result =
    if paged
      first_collection_page(rsrc_path, page_size, sort, filter, cnx)
    else
      fetch_all_collection_pages(rsrc_path, sort, filter, cnx)
    end
  instantiate ? result.map { |m| new m } : result
end

.all_ids(refresh = false, cnx: Jamf.cnx) ⇒ Array<Integer>

An array of the ids for all collection members. According to the specs ALL collection resources must have an ID, which is used in the resource path.

NOTE: This method uses the cached version of .all

Parameters:

  • refresh (Boolean) (defaults to: false) —

    re-fetch and re-cache the full list of all instances. Ignored if paged:, page_size:, sort:, filter: or instantiate: are used.

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    The API connection to use, default: Jamf.cnx

Returns:



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 277

def self.all_ids(refresh = false, cnx: Jamf.cnx)
  all(refresh: refresh, cnx: cnx).map { |m| m[:id] }
end

.allocate(*args, &block) ⇒ Object Originally defined in module BaseClass

Can’t allocate if base class

.base_class? ⇒ Boolean Originally defined in module BaseClass

Returns:

  • (Boolean)

.collection_count(rsrc, cnx: Jamf.cnx) ⇒ Integer Originally defined in module Pageable

Returns How many items exist in this collection?.

Parameters:

  • rsrc (String) —

    The collection resource GET endpoint

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    The API connection to use

Returns:

  • (Integer) —

    How many items exist in this collection?

.count(cnx: Jamf.cnx) ⇒ Object 



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 82

def self.count(cnx: Jamf.cnx)
  collection_count(rsrc_path, cnx: Jamf.cnx)
end

.creatable? ⇒ Boolean

Bu default, subclasses are creatable, i.e. new instances can be created with .create, and added to the JSS with .save If a subclass is NOT creatble for any reason, just add

extend Jamf::UnCreatable

and this method will return false

Returns:

  • (Boolean) 


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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 456

def self.creatable?
  true
end

.create(**params) ⇒ Object

Make a new thing to be added to the API

Raises:



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 461

def self.create(**params)
  stop_if_base_class

  raise Jamf::UnsupportedError, "#{self}'s are not currently creatable via the API" unless creatable?

  # Which connection to use
  cnx = params.delete :cnx
  cnx ||= Jamf.cnx

  params.delete :id # no such animal when .creating
  params.keys.each do |param|
    raise ArgumentError, "Unknown parameter: #{param}" unless self::OBJECT_MODEL.key? param

    if params[param].is_a? Array
      params[param].map! { |val| validate_attr param, val, cnx: cnx }
    else
      params[param] = validate_attr param, params[param], cnx: cnx
    end
  end

  params[:creating_from_create] = true
  new params, cnx: cnx
end

.deletable? ⇒ Boolean

By default, CollectionResource subclass instances are deletable. If not, just extend the subclass with Jamf::UnDeletable, and this will return false, and .delete & #delete will raise errors

Returns:

  • (Boolean) 


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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 517

def self.deletable?
  true
end

.delete(*ids, cnx: Jamf.cnx) ⇒ Array<Jamf::Connection::APIError::ErrorInfo] Info about any ids that failed to be deleted.

Delete one or more objects by id

Parameters:

  • ids (Array<String,Integer>) —

    The ids to delete

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    The connection to use, default: Jamf.cnx

Returns:

Raises:



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 530

def self.delete(*ids, cnx: Jamf.cnx)
  raise Jamf::UnsupportedError, "Deleting #{self} objects is not currently supported" unless deletable?

  return bulk_delete(ids, cnx: Jamf.cnx) if ancestors.include? Jamf::BulkDeletable

  errs = []
  ids.each do |id_to_delete|
    begin
      cnx.delete "#{rsrc_path}/#{id_to_delete}"
    rescue Jamf::Connection::APIError => e
      raise e unless e.httpStatus == 404

      errs += e.errors
    end # begin
  end # ids.each
  errs
end

.fetch(random = nil, cnx: Jamf.cnx, **ident_and_val) ⇒ CollectionResource

Retrieve a member of a CollectionResource from the API

To create new members to be added to the JSS, use create

You must know the specific identifier attribute you’re looking up, e.g. :id or :name or :udid, (or an aliase thereof) then you can specify it like ‘.fetch name: ’somename’‘, or `.fetch udid: ’someudid’‘

Parameters:

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    the connection to use to fetch the object

  • ident_and_val (Hash) —

    an identifier attribute key and a search value

Returns:

Raises:



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 500

def self.fetch(random = nil, cnx: Jamf.cnx, **ident_and_val)
  stop_if_base_class
  ident, value = ident_and_val.first
  data =
    if random
      all.sample
    elsif ident && value
      raw_data(cnx: cnx, **ident_and_val)
    end
  raise Jamf::NoSuchItemError, "No matching #{self}" unless data

  new data, cnx: cnx
end

.fetch_collection_page(rsrc, page, page_size, sort, filter, cnx: Jamf.cnx) ⇒ Array<Object> Originally defined in module Pageable

Get a specific page of a paged collection request, possibly sorted & filtered.

Parameters:

  • rsrc (String) —

    The collection resource GET endpoint

  • page (Integer) —

    which page to get

  • page_size (Integer) —

    how many items per page

  • sort (String, Array<String>) —

    server-side sorting parameters

  • filter (String) —

    RSQL String limiting the result set

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    The API connection to use

Returns:

  • (Array<Object>) —

    The parsed JSON for the requested page

.identifiers ⇒ Array<Symbol>

Returns the attribute names that are marked as identifiers.

Returns:

  • (Array<Symbol>) —

    the attribute names that are marked as identifiers



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 78

def self.identifiers
  self::OBJECT_MODEL.select { |_attr, deets| deets[:identifier] }.keys
end

.map_all(ident, to:, cnx: Jamf.cnx, refresh: false) ⇒ Hash {Symbol: Object}

A Hash of all members of this collection where the keys are some identifier and values are any other attribute.

NOTE: This method uses the cached version of .all

Parameters:

  • ident (Symbol) —

    An identifier of this Class, used as the key for the mapping Hash. Aliases are acceptable, e.g. :sn for :serialNumber

  • to (Symbol) —

    The attribute to which the ident will be mapped. Aliases are acceptable, e.g. :name for :displayName

  • refresh (Boolean) (defaults to: false) —

    re-fetch and re-cache the full list of all instances. Ignored if paged:, page_size:, sort:, filter: or instantiate: are used.

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    The API connection to use, default: Jamf.cnx

Returns:

  • (Hash {Symbol: Object}) —

    A Hash of identifier mapped to attribute

Raises:



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 298

def self.map_all(ident, to:, cnx: Jamf.cnx, refresh: false)
  real_ident = attr_key_for_alias ident
  raise Jamf::InvalidDataError, "No identifier #{ident} for class #{self}" unless
  identifiers.include? real_ident

  real_to = attr_key_for_alias to
  raise Jamf::NoSuchItemError, "No attribute #{to} for class #{self}" unless self::OBJECT_MODEL.key? real_to

  list = all refresh: refresh, cnx: cnx
  to_class = self::OBJECT_MODEL[real_to][:class]
  mapped = list.map do |i|
    [
      i[real_ident],
      to_class.is_a?(Symbol) ? i[real_to] : to_class.new(i[real_to])
    ]
  end # do i
  mapped.to_h
end

.new(*args, &block) ⇒ Object Originally defined in module BaseClass

Can’t instantiate if base_class

.next_page_of_all ⇒ Object

Fetch the next page of a paged .all request. See Pagable.next_collection_page



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 261

def self.next_page_of_all
  next_collection_page
end

.raw_data(value = nil, cnx: Jamf.cnx, **ident_and_val) ⇒ Hash?

Given a key (identifier) and value for this collection, return the raw data Hash (the JSON object) for the matching API object or nil if there’s no match for the given value.

In general you should use this if the form:

raw_data identifier: value

where identifier is one of the available identifiers for this class like id:, name:, serialNumber: etc.

In the unlikely event that you dont know which identifier a value is for or want to be able to take any of them without specifying, then you can use

raw_data some_value

If some_value is an integer or a string containing an integer, it is assumed to be an :id otherwise all the available identifers are searched, in the order you see them when you call <class>.identifiers

If no matching object is found, nil is returned.

Everything except :id is treated as a case-insensitive String

Parameters:

  • value (String, Integer) (defaults to: nil) —

    The identifier value to search fors

  • key: (Symbol) —

    The identifier being used for the search. E.g. if :serialNumber, then the value must be a known serial number, it is not checked against other identifiers. Defaults to :id

Returns:

  • (Hash, nil) —

    the basic dataset of the matching object, or nil if it doesn’t exist

Raises:

  • (ArgumentError) 


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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 353

def self.raw_data(value = nil, cnx: Jamf.cnx, **ident_and_val)
  stop_if_base_class

  # given a value with no ident key
  return raw_data_by_value_only(value, cnx: Jamf.cnx) if value

  # if we're here, we should know our ident key and value
  ident, value = ident_and_val.first
  raise ArgumentError, 'Required parameter "identifier: value", where identifier is id:, name: etc.' unless ident && value

  return raw_data_by_id(value, cnx: cnx) if ident == :id
  return unless identifiers.include? ident

  raw_data_by_other_identifier(ident, value, cnx: cnx)
end

.stop_if_base_class(action = DEFAULT_ACTION) ⇒ Object Originally defined in module BaseClass

raise an exception if this class is a base class

.valid_id(value = nil, cnx: Jamf.cnx, **ident_and_val) ⇒ String?

Look up the valid ID for any arbitrary identifier. In general you should use this if the form:

valid_id identifier: value

where identifier is one of the available identifiers for this class like id:, name:, serialNumber: etc.

In the unlikely event that you dont know which identifier a value is for or want to be able to take any of them without specifying, then you can use

valid_id some_value

If some_value is an integer or a string containing an integer, it is assumed to be an id: otherwise all the available identifers are searched, in the order you see them when you call <class>.identifiers

If no matching object is found, nil is returned.

WARNING: Do not use this to look up ids for getting the raw API data for an object. Since this calls .raw_data itself, it is redundant to use .valid_id to get an id to then pass on to .raw_data Use raw_data directly like this:

data = raw_data(ident: val)

Parameters:

  • value (String, Integer) (defaults to: nil) —

    A value for an arbitrary identifier

  • cnx (Jamf::Connection) (defaults to: Jamf.cnx) —

    The connection to use. default: Jamf.cnx

  • ident_and_val (Hash{Symbol: String}) —

    The identifier key and the value to look for in that key, e.g. name: ‘foo’ or serialNumber: ‘ASDFGH’

Returns:

  • (String, nil) —

    The id (integer-in-string) of the object, or nil if no match found



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 445

def self.valid_id(value = nil, cnx: Jamf.cnx, **ident_and_val)
  raw_data(value, cnx: cnx, **ident_and_val)&.dig(:id)
end

Instance Method Details

#<=>(other) ⇒ Object

Two collection resource objects are the same if their id’s are the same



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 597

def <=>(other)
  id <=> other.id
end

#delete ⇒ Object

Raises:



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 590

def delete
  raise Jamf::UnsupportedError, "Deleting #{self} objects is not currently supported" unless self.class.deletable?

  @cnx.delete rsrc_path
end

#exist? ⇒ Boolean

Instance Methods

Returns:

  • (Boolean) 


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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 580

def exist?
  !@id.nil?
end

#rsrc_path ⇒ Object 



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# File 'lib/jamf/api/base_classes/collection_resource.rb', line 584

def rsrc_path
  return unless exist?

  "#{self.class.rsrc_path}/#{@id}"
end