Models

class tom_targets.base_models.TargetMatchManager(*args, **kwargs)

Search for matches amongst Target objects. Return Queryset containing relevant TARGET matches.

NOTE:

is_unique and match_name are used throughout the code to determine if a target or a name is unique. These functions can be overridden in a subclass to provide custom matching logic. Examples of this can be found in the documentation (https://tom-toolkit.readthedocs.io/en/stable/targets/target_matcher.html).

is_unique(target, *args, **kwargs)

Check if the given target is unique. This function uses TargetMatchManager.match_target() to determine if any targets exist in the DB other than the given target would be considered by the user to be a duplicate of the given target.

This function is used in the Target.validate_unique() function to check for uniqueness.

Parameters:

target – The target object to be checked against.

Returns:

True if the target is unique, False otherwise.

match_target(target, *args, **kwargs)

Check if any other targets match the given target. This function returns a queryset that is used by TargetMatchManager.is_unique() to determine if a target is unique.

By default, this checks for a match in the name field using the match_name function. This can be overridden in a subclass to provide custom matching logic.

Parameters:

target – The target object to be checked against.

Returns:

queryset containing matching Target(s).

match_name(name)

Returns a queryset of targets with matching names.

By default, this checks for a fuzzy match using the match_fuzzy_name function. This can be overridden in a subclass to provide custom matching logic.

Parameters:

name – The string against which target names will be matched.

Returns:

queryset containing matching Target(s).

Returns a queryset containing any targets that are within the given radius of the given ra and dec.

Parameters:

  • ra (float) – The right ascension of the target in degrees.

  • dec (float) – The declination of the target in degrees.

  • radius (float) – The radius in arcseconds within which to search for targets.

Returns:

queryset containing matching Target(s).

match_exact_name(name)

Returns a queryset of targets with a name that exactly match the name that is received

Parameters:

name – The string against which target names will be matched.

Returns:

queryset containing matching Target(s).

match_fuzzy_name(name, input_queryset=None)

Returns a queryset of targets with a name OR ALIAS that, when processed by simplify_name, match a similarly processed version of the name that is received.

Parameters:

  • name – The string against which target names and aliases will be matched.

  • input_queryset – Optional queryset to filter the results. If not provided, all targets will be considered.

Returns:

queryset containing matching Targets. Will return targets even when matched value is an alias.

simplify_name(name)

Create a simplified name to be used for comparison in match_fuzzy_name. By default, this method removes capitalization, spaces, dashes, underscores, and parentheses from the name. This can be overridden in a subclass to provide custom name simplification.

Parameters:

name – The string to be simplified.

Returns:

A simplified string version of the given name.

tom_targets.base_models.get_target_model_app_label()

Function to retrieve the app label of the target model class from settings.py. If not found, returns the default ‘tom_targets’.

class tom_targets.base_models.BaseTarget(*args, **kwargs)

Class representing a target in a TOM

Parameters:

  • name (str) – The name of this target e.g. Barnard’s star.

  • type (datetime) – The type of this target.

  • created – The time at which this target was created in the TOM database.

  • modified – The time at which this target was changed in the TOM database.

  • ra (float) – Right Ascension, in degrees.

  • dec (float) – Declination, in degrees.

  • epoch (float) – Julian Years. Max 2100.

  • parallax (float) – Parallax, in milliarcseconds.

  • pm_ra (float) – Proper Motion: RA. Milliarsec/year.

  • pm_dec (float) – Proper Motion: Dec. Milliarsec/year.

  • galactic_lng (float) – Galactic Longitude in degrees.

  • galactic_lat (float) – Galactic Latitude in degrees.

  • distance (float) – Parsecs.

  • distance_err (float) – Parsecs.

  • scheme (str) – Orbital Element Scheme

  • epoch_of_elements (float) – Epoch of elements as Modified Julian Date (MJD).

  • mean_anomaly (float) – Angle in degrees.

  • arg_of_perihelion (float) – Argument of Perhihelion. J2000. Degrees.

  • eccentricity (float) – Eccentricity

  • lng_asc_node (float) – Longitude of Ascending Node. J2000. Degrees.

  • inclination (float) – Inclination to the ecliptic. J2000. Degrees.

  • mean_daily_motion (float) – Degrees per day.

  • semimajor_axis (float) – Semimajor Axis in AU

  • epoch_of_perihelion (float) – Time of perihelion as a Modified Julian Date (MJD).

  • ephemeris_period (float) – Ephemeris period in days

  • ephemeris_period_err (float) – Days

  • ephemeris_epoch (float) – Days

  • ephemeris_epoch_err (float) – Days

  • abs_mag (float) – Asteroid/Comet absolute magnitude (H or m1)

  • slope (float) – Asteroid/Comet slope parameter (G or k1)

save(*args, **kwargs)

Saves Target model data to the database, including extra fields. After saving to the database, also runs the hook target_post_save. The hook run is the one specified in settings.py.

Keyword Arguments:

  • extras (dict): dictionary of key/value pairs representing target attributes

validate_unique(*args, **kwargs)

Ensures that Target.name and all aliases of the target are unique. Called automatically when checking form.is_valid(). Should call Target.full_clean() to validate before save.

featured_image()

Gets the DataProduct associated with this Target that is a FITS file and is uniquely marked as “featured”.

Returns:

DataProduct with data_product_type of fits_file and featured as True

Return type:

DataProduct

property names

Gets a list with the name and aliases of this target

Returns:

list of all names and TargetName values associated with this target

Return type:

list

property constellation

Gets the constellation of this target if it is sidereal

Returns:

The constellation of this target according to astropy

Return type:

str

property future_observations

Gets all observations scheduled for this Target

Returns:

List of ObservationRecord objects without a terminal status

Return type:

list

property extra_fields

Gets all TargetExtra fields associated with this Target, provided the key is defined in settings.py EXTRA_FIELDS

Returns:

Dictionary of key/value pairs representing target attributes

Return type:

dict

property tags

Gets all TargetExtra fields associated with this Target, provided the key is NOT defined in settings.py EXTRA_FIELDS

Returns:

Dictionary of key/value pairs representing target attributes

Return type:

dict

as_dict()

Returns dictionary representation of attributes, sets the order of attributes associated with the type of this Target and then includes any additional attributes that are not empty and have not been ‘hidden’.

Returns:

Dictionary of key/value pairs representing target attributes

Return type:

dict

give_user_access(user)

Gives the given user permissions to view this target. :param user: :return:

tom_targets.models.get_target_model_class()

Function to retrieve the target model class from settings.py. If not found, returns the default BaseTarget.

class tom_targets.models.TargetName(*args, **kwargs)

Class representing an alternative name for a Target.

Parameters:

  • target – The Target object this TargetName is associated with.

  • name (str) – The name that this TargetName object represents.

  • created (datetime) – The time at which this target name was created in the TOM database.

  • modified (datetime) – The time at which this target name was modified in the TOM database.

validate_unique(*args, **kwargs)

Ensures that Target.name and all aliases of the target are unique. Called automatically when checking form.is_valid(). Should call TargetName.full_clean() to validate before save.

class tom_targets.models.TargetExtra(*args, **kwargs)

Class representing a list of targets in a TOM.

Parameters:

  • target – The Target object this TargetExtra is associated with.

  • key (str) – Denotation of the value represented by this TargetExtra object.

  • value (str) – Value of the field stored in this object.

  • float_value (float) – Float representation of the value field for this object, if applicable.

  • bool_value (bool) – Boolean representation of the value field for this object, if applicable.

  • time_value (datetime) – Datetime representation of the value field for this object, if applicable.

save(*args, **kwargs)

Saves TargetExtra model data to the database. In the process, converts the string value of the TargetExtra to the appropriate type, and stores it in the corresponding field as well.

typed_value(type_val)

Returns the value of this TargetExtra in the corresponding type provided by the caller. If the type is invalid, returns the string representation.

Parameters:

type_val (str) – Requested type of the TargetExtra value field

Returns:

Requested typed value field of this object

Return type:

float, boolean, datetime, or str

class tom_targets.models.TargetList(*args, **kwargs)

Class representing a list of targets in a TOM.

Parameters:

  • name (str) – The name of the target list

  • targets – Set of Target objects associated with this TargetList

  • created (datetime) – The time at which this target list was created.

  • modified (datetime) – The time at which this target list was modified in the TOM database.

class tom_targets.models.PersistentShare(*args, **kwargs)

Class representing a persistent share setup between a sharing destination and a Target

Parameters:

  • target – The Target you want to share

  • user – The User that created this PersistentShare, for accountability purposes.

  • destination (str) – The sharing destination, as it appears in your TOM’s DATA_SHARING settings dict

  • created (datetime) – The time at which this PersistentShare was created