models
variable.models
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Classes¤
PermissionsBase
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Bases: Model
Base model for models that require permissions.
Functions¤
set_model_permissions()
classmethod
¤
Set model-level add permissions.
Source code in management\models.py
74 75 76 77 |
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set_object_permissions()
¤
Set object-level delete, change and view permissions.
Source code in management\models.py
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 |
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Sensor
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Bases: PermissionsBase
Specific sensor details.
Attributes:
Name | Type | Description |
---|---|---|
sensor_id |
int
|
Primary key, sensor id. |
code |
(str) sensor code. |
|
sensor_type |
SensorType
|
sensor type. |
sensor_brand |
SensorBrand
|
sensor brand. |
model |
str
|
specific model of the sensor. |
serial |
str
|
serial number of the sensor. |
status |
bool
|
sensor status. |
Functions¤
__str__()
¤
Return the sensor code.
Source code in sensor\models.py
112 113 114 |
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get_absolute_url()
¤
Return the absolute url of the sensor.
Source code in sensor\models.py
116 117 118 |
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SensorInstallation
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Bases: PermissionsBase
Represents an installation of a Sensor at a Station, which measures a Variable.
It includes metadata for installation and finishing date, as well as state (active or not).
Attributes:
Name | Type | Description |
---|---|---|
sensorinstallation_id |
AutoField
|
Primary key. |
variable |
ForeignKey
|
Variable measured by the sensor. |
station |
ForeignKey
|
Station where the sensor is installed. |
sensor |
ForeignKey
|
Sensor used for the measurement. |
start_date |
DateField
|
Start date of the installation. |
end_date |
DateField
|
End date of the installation. |
state |
BooleanField
|
Is the sensor active? |
Station
¤
Bases: PermissionsBase
Main representation of a station, including several metadata.
Attributes:
Name | Type | Description |
---|---|---|
visibility |
str
|
Visibility level of the object, including an "internal" option. |
station_id |
int
|
Primary key. |
station_code |
str
|
Unique code for the station. |
station_name |
str
|
Brief description of the station. |
station_type |
StationType
|
Type of the station. |
country |
Country
|
Country where the station is located. |
region |
Region
|
Region within the Country where the station is located. |
ecosystem |
Ecosystem
|
Ecosystem associated with the station. |
institution |
Institution
|
Institutional partner responsible for the station. |
place_basin |
PlaceBasin
|
Place-Basin association. |
station_state |
bool
|
Is the station operational? |
timezone |
str
|
Timezone of the station. |
station_latitude |
Decimal
|
Latitude of the station, in degrees [-90 to 90]. |
station_longitude |
Decimal
|
Longitude of the station, in degrees [-180 to 180]. |
station_altitude |
int
|
Altitude of the station. |
influence_km |
Decimal
|
Area of influence in km2. |
station_file |
ImageField
|
Photography of the station. |
station_external |
bool
|
Is the station external? |
variables |
str
|
Comma-separated list of variables measured by the station. |
Attributes¤
variables_list: list[str]
property
¤
Return the list of variables measured by the station.
Only variables with data in the database are returned.
Returns:
Type | Description |
---|---|
list[str]
|
list[str]: List of variables measured by the station. |
Functions¤
__str__()
¤
Return the station code.
Source code in station\models.py
458 459 460 |
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get_absolute_url()
¤
Return the absolute url of the station.
Source code in station\models.py
462 463 464 |
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set_object_permissions()
¤
Set object-level permissions.
This method is called by the save method of the model to set the object-level permissions based on the visibility level of the object. In addition to the standard permissions for the station, the view_measurements permission is set which controls who can view the measurements associated to the station.
Source code in station\models.py
466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 |
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Unit
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Bases: PermissionsBase
Unit of measurement with a name and a symbol.
Attributes:
Name | Type | Description |
---|---|---|
unit_id |
AutoField
|
Primary key. |
name |
CharField
|
Name of the unit, eg. meters per second. |
initials |
CharField
|
Symbol for the unit, eg. m/s. |
Functions¤
__str__()
¤
Return the string representation of the object.
Source code in variable\models.py
42 43 44 |
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get_absolute_url()
¤
Get the absolute URL of the object.
Source code in variable\models.py
46 47 48 |
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Variable
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Bases: PermissionsBase
A variable with a physical meaning.
Such as precipitation, wind speed, wind direction, soil moisture, including the associated unit. It also includes metadata to help identify what is a reasonable value for the data, to flag outliers and to help with the validation process.
The nature of the variable can be one of the following:
- sum: Cumulative value over a period of time.
- average: Average value over a period of time.
- value: One-off value.
Attributes:
Name | Type | Description |
---|---|---|
variable_id |
AutoField
|
Primary key. |
variable_code |
CharField
|
Code of the variable, eg. airtemperature. |
name |
CharField
|
Human-readable name of the variable, eg. Air temperature. |
unit |
ForeignKey
|
Unit of the variable. |
maximum |
DecimalField
|
Maximum value allowed for the variable. |
minimum |
DecimalField
|
Minimum value allowed for the variable. |
diff_error |
DecimalField
|
If two sequential values in the time-series data of this variable differ by more than this value, the validation process can mark this with an error flag. |
outlier_limit |
DecimalField
|
The statistical deviation for defining outliers, in times the standard deviation (sigma). |
null_limit |
DecimalField
|
The max % of null values (missing, caused by e.g. equipment malfunction) allowed for hourly, daily, monthly data. Cumulative values are not deemed trustworthy if the number of missing values in a given period is greater than the null_limit. |
nature |
CharField
|
Nature of the variable, eg. if it represents a one-off value, the average over a period of time or the cumulative value over a period |
Attributes¤
is_cumulative: bool
property
¤
Return True if the nature of the variable is sum.
Functions¤
__str__()
¤
Return the string representation of the object.
Source code in variable\models.py
165 166 167 |
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clean()
¤
Validate the model fields.
Source code in variable\models.py
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 |
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get_absolute_url()
¤
Get the absolute URL of the object.
Source code in variable\models.py
169 170 171 |
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