RecordSet

Resumen

RecordSet objects are a lightweight representation of a table. They are a special data element that contains not only schema but also the data. The RecordSet object is also how tables are sent and received from the server.

Debate

Nota:

If you're loading a table into a new RecordSet and modifying the RecordSet with a geoprocessing tool that modifies the input such as Calculate Field or a function such as UpdateCursor, the original table will also be modified.

Sintaxis

 RecordSet ({table})

Parámetro	Explicación	Tipo de datos
table	The table to load into the RecordSet object. The input can be a catalog path to a feature class, a URL to a hosted feature layer, a JSON with the syntax {"url":"<url>", "serviceToken":"<serviceToken>"} to load data from external sources that require an access token, or an Esri (FeatureSet) JSON string. An Esri JSON (.json) is a standard for encoding feature (geometry and attribute) data as a JSON object. For tables, the JSON does not include geometryType, spatialReference, or geometry keys.	String

Propiedades

Propiedad	Explicación	Tipo de datos
JSON (Sólo lectura)	Returns an Esri JSON representation of the geometry as a string. Sugerencia: The returned string can be converted to a dictionary using the json module's loads function.	String

Descripción general del método

Método	Explicación
load (table_path, {where_clause})	Imports a table into the RecordSet object.
save (table_path)	Export to a table.

Métodos

load (table_path, {where_clause})

Parámetro	Explicación	Tipo de datos
table_path	The table to load into the RecordSet object. The input can be a catalog path to a feature class, a URL to a hosted feature layer, a JSON with the syntax {"url":"<url>", "serviceToken":"<serviceToken>"} to load data from external sources that require an access token, or an Esri JSON string.	String
where_clause	An SQL expression used to select a subset of records. For more information on SQL syntax, see SQL reference for query expressions used in ArcGIS. (El valor predeterminado es None)	String

The optional arguments are positional only; they cannot be passed by named arguments.

save (table_path)

Parámetro	Explicación	Tipo de datos
table_path	The output table to be created.	String

Muestra de código

RecordSet example 1

Import a server toolbox; get the RecordSet from the server tool's specified parameter.

import arcpy

# Add a custom server toolbox
arcpy.ImportToolbox("http://myserver/arcgis/services;Geocode")

# Get recordset from server tool's first parameter to use as schema
in_recordset = arcpy.GetParameterValue("GeocodeAddress", 0)

RecordSet example 2

Create a RecordSet and load a subset of a hosted table.

import arcpy

# Set data
in_dataset = "https://maps.my.org/arcgis/rest/services/Tables/MapServer/0"
query = "Country_Code: 'IT'"

# Create empty RecordSet
record_set = arcpy.RecordSet()

# Load data into RecordSet with query
record_set.load(in_dataset, query)

RecordSet example 3

Create a RecordSet from an Esri JSON string.

import arcpy

# Set data
data_json = '''{
 "objectIdFieldName": "objectid",
 "globalIdFieldName": "globalid",
 "fields": [
  {
   "name": "objectid",
   "alias": "OBJECTID",
   "type": "esriFieldTypeOID"
  },
  {
   "name": "requestid",
   "alias": "Service Request ID",
   "type": "esriFieldTypeString",
   "length": 25
  },
  {
   "name": "requesttype",
   "alias": "Problem",
   "type": "esriFieldTypeString",
   "length": 100
  },
  {
   "name": "comments",
   "alias": "Comments",
   "type": "esriFieldTypeString",
   "length": 255
  }
 ],
 "features": [
  {
   "attributes": {
    "objectid": 246362,
    "requestid": "1",
    "requesttype": "Sidewalk Damage",
    "comments": "Pothole"
   }
  },
  {
   "attributes": {
    "objectid": 246382,
    "requestid": "2",
    "requesttype": "Pothole",
    "comments": "Jhh"
   }
  }
 ]
}'''

# Create FeatureSet from Esri JSON
feature_set = arcpy.RecordSet(data_json)