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如何使用 IoT Central REST API 管理设备模板
通过 IoT Central REST API，你可以开发与 IoT Central 应用程序集成的客户端应用程序。 可以使用 REST API 来管理 IoT Central 应用程序中的设备模板。
每个 IoT Central REST API 调用都需要授权标头。 有关详细信息，请参阅如何对 IoT Central REST API 调用进行身份验证和授权。
有关 IoT Central REST API 的参考文档，请参阅 Azure IoT Central REST API 参考。
提示
可以使用 Postman 尝试本文所述的 REST API 调用。 下载 IoT Central Postman 集合并将其导入 Postman。 在集合中需要设置变量，例如应用子域和管理员令牌。
若要了解如何使用 IoT Central UI 管理设备模板，请参阅如何设置设备模板和如何编辑设备模板
设备模板
设备模板包含设备模型和视图定义。 REST API 允许管理设备模型，包括云属性定义。 必须使用 UI 创建和管理视图。
设备模板的设备模型部分指定要连接到应用程序的设备的功能。 功能包括遥测、属性和命令。 模型是使用 DTDL V2 定义的。
注意
IoT Central 定义了 DTDL 语言的一些扩展。 若要了解详细信息，请参阅 IoT Central 扩展。
设备模板 REST API
使用 IoT Central REST API 可进行以下操作：
- 将设备模板添加到应用程序
- 在应用程序中更新设备模板
- 获取应用程序中的设备模板列表
- 按 ID 获取设备模板
- 在应用程序中删除设备模板
- 筛选应用程序中的设备模板列表
添加设备模板
使用以下请求创建并发布新的设备模板。 对于以这种方式创建的设备模板，系统将自动为其生成默认视图。
PUT https://{your app subdomain}/api/deviceTemplates/{deviceTemplateId}?api-version=2022-07-31
注意
设备模板 ID 遵循 DTDL 命名约定，例如：dtmi:contoso:mythermostattemplate;1
下面的示例演示了为恒温器设备添加设备模板的请求正文。 capabilityModel 包括温度遥测、两个属性和一个命令。 设备模板定义 CustomerName 云属性，并使用 decimalPlaces、displayUnit、maxValue 和 minValue 自定义 targetTemperature 属性。 设备模板 @id 的值必须与 URL 中的 deviceTemplateId 值一致。 设备模板 @id 的值与 capabilityModel@id 的值不同。
{
"displayName": "Thermostat",
"@id": "dtmi:contoso:mythermostattemplate;1",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
],
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;1",
"@type": "Interface",
"contents": [
{
"@type": [
"Telemetry",
"Temperature"
],
"description": "Temperature in degrees Celsius.",
"displayName": "Temperature",
"name": "temperature",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Allows to remotely specify the desired target temperature.",
"displayName": "Target Temperature",
"name": "targetTemperature",
"schema": "double",
"unit": "degreeCelsius",
"writable": true,
"decimalPlaces": 1,
"displayUnit": "C",
"maxValue": 80,
"minValue": 50
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Returns the max temperature since last device reboot.",
"displayName": "Max temperature since last reboot.",
"name": "maxTempSinceLastReboot",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": "Command",
"description": "This command returns the max, min and average temperature from the specified time to the current time.",
"displayName": "Get report",
"name": "getMaxMinReport",
"request": {
"@type": "CommandPayload",
"description": "Period to return the max-min report.",
"displayName": "Since",
"name": "since",
"schema": "dateTime"
},
"response": {
"@type": "CommandPayload",
"displayName": "Temperature Report",
"name": "tempReport",
"schema": {
"@type": "Object",
"fields": [
{
"displayName": "Max temperature",
"name": "maxTemp",
"schema": "double"
},
{
"displayName": "Min temperature",
"name": "minTemp",
"schema": "double"
},
{
"displayName": "Average Temperature",
"name": "avgTemp",
"schema": "double"
},
{
"displayName": "Start Time",
"name": "startTime",
"schema": "dateTime"
},
{
"displayName": "End Time",
"name": "endTime",
"schema": "dateTime"
}
]
}
}
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Customer Name",
"name": "CustomerName",
"schema": "string"
}
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
}
}
请求正文包含某些必填字段：
@id：唯一 ID，采用简单统一资源名称的形式。@type：声明顶级对象为"ModelDefinition","DeviceModel"。@context：指定用于接口的 DTDL 版本。contents：列出组成设备的属性、遥测和命令。 这些功能可在多个接口中定义。capabilityModel：每个设备模板都有一个功能模型。 在每个模块功能模型和设备模型之间建立关系。 功能模型可实现一个或多个模块接口。
提示
设备模板 JSON 不是标准 DTDL 文档。 设备模板 JSON 包括 IoT Central 特定数据，例如云属性定义和显示单元。 可以使用设备模板 JSON 格式通过 REST API、CLI 和 UI 在 IoT Central 中导入和导出设备模板。
有一些可选字段可用于向功能模型中添加更多详细信息，例如显示名称和说明。
“实现”部分的接口列表中的每个条目都有：
name：接口的编程名称。schema：功能模型实现的接口。
对此请求的响应如下方示例所示：
{
"etag": "\"~F27cqSo0ON3bfOzwgZxAl89/JVvM80+dds6y8+mZh5M=\"",
"displayName": "Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;1",
"@type": "Interface",
"contents": [
{
"@type": [
"Telemetry",
"Temperature"
],
"description": "Temperature in degrees Celsius.",
"displayName": "Temperature",
"name": "temperature",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": [
"Property",
"Temperature",
"NumberValue"
],
"description": "Allows to remotely specify the desired target temperature.",
"displayName": "Target Temperature",
"name": "targetTemperature",
"schema": "double",
"unit": "degreeCelsius",
"writable": true,
"decimalPlaces": 1,
"displayUnit": "C",
"maxValue": 80,
"minValue": 50
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Returns the max temperature since last device reboot.",
"displayName": "Max temperature since last reboot.",
"name": "maxTempSinceLastReboot",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": "Command",
"description": "This command returns the max, min and average temperature from the specified time to the current time.",
"displayName": "Get report",
"name": "getMaxMinReport",
"request": {
"@type": "CommandPayload",
"description": "Period to return the max-min report.",
"displayName": "Since",
"name": "since",
"schema": "dateTime"
},
"response": {
"@type": "CommandPayload",
"displayName": "Temperature Report",
"name": "tempReport",
"schema": {
"@type": "Object",
"fields": [
{
"displayName": "Max temperature",
"name": "maxTemp",
"schema": "double"
},
{
"displayName": "Min temperature",
"name": "minTemp",
"schema": "double"
},
{
"displayName": "Average Temperature",
"name": "avgTemp",
"schema": "double"
},
{
"displayName": "Start Time",
"name": "startTime",
"schema": "dateTime"
},
{
"displayName": "End Time",
"name": "endTime",
"schema": "dateTime"
}
]
}
}
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Customer Name",
"name": "CustomerName",
"schema": "string"
}
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
}
获取设备模板
使用以下请求从应用程序中检索设备模板的详细信息：
GET https://{your app subdomain}/api/deviceTemplates/{deviceTemplateId}?api-version=2022-07-31
注意
你可将鼠标悬停在设备上，从 IoT Central 应用程序 UI 中获得 deviceTemplateId。
对此请求的响应如下方示例所示：
{
"etag": "\"~F27cqSo0ON3bfOzwgZxAl89/JVvM80+dds6y8+mZh5M=\"",
"displayName": "Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;1",
"@type": "Interface",
"contents": [
{
"@type": [
"Telemetry",
"Temperature"
],
"description": "Temperature in degrees Celsius.",
"displayName": "Temperature",
"name": "temperature",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": [
"Property",
"Temperature",
"NumberValue"
],
"description": "Allows to remotely specify the desired target temperature.",
"displayName": "Target Temperature",
"name": "targetTemperature",
"schema": "double",
"unit": "degreeCelsius",
"writable": true,
"decimalPlaces": 1,
"displayUnit": "C",
"maxValue": 80,
"minValue": 50
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Returns the max temperature since last device reboot.",
"displayName": "Max temperature since last reboot.",
"name": "maxTempSinceLastReboot",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": "Command",
"description": "This command returns the max, min and average temperature from the specified time to the current time.",
"displayName": "Get report",
"name": "getMaxMinReport",
"request": {
"@type": "CommandPayload",
"description": "Period to return the max-min report.",
"displayName": "Since",
"name": "since",
"schema": "dateTime"
},
"response": {
"@type": "CommandPayload",
"displayName": "Temperature Report",
"name": "tempReport",
"schema": {
"@type": "Object",
"fields": [
{
"displayName": "Max temperature",
"name": "maxTemp",
"schema": "double"
},
{
"displayName": "Min temperature",
"name": "minTemp",
"schema": "double"
},
{
"displayName": "Average Temperature",
"name": "avgTemp",
"schema": "double"
},
{
"displayName": "Start Time",
"name": "startTime",
"schema": "dateTime"
},
{
"displayName": "End Time",
"name": "endTime",
"schema": "dateTime"
}
]
}
}
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Customer Name",
"name": "CustomerName",
"schema": "string"
}
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
}
更新设备模板
PATCH https://{your app subdomain}/api/deviceTemplates/{deviceTemplateId}?api-version=2022-07-31
示例请求正文类似于以下示例，将云属性添加到LastMaintenanceDatecapabilityModel设备模板中的 ：
{
"capabilityModel": {
"contents": [
{
"@type": [
"Telemetry",
"Temperature"
],
"description": "Temperature in degrees Celsius.",
"displayName": "Temperature",
"name": "temperature",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Allows to remotely specify the desired target temperature.",
"displayName": "Target Temperature",
"name": "targetTemperature",
"schema": "double",
"unit": "degreeCelsius",
"writable": true,
"decimalPlaces": 1,
"displayUnit": "C",
"maxValue": 80.0,
"minValue": 50.0
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Returns the max temperature since last device reboot.",
"displayName": "Max temperature since last reboot.",
"name": "maxTempSinceLastReboot",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": "Command",
"description": "This command returns the max, min and average temperature from the specified time to the current time.",
"displayName": "Get report",
"name": "getMaxMinReport",
"request": {
"@type": "CommandPayload",
"description": "Period to return the max-min report.",
"displayName": "Since",
"name": "since",
"schema": "dateTime"
},
"response": {
"@type": "CommandPayload",
"displayName": "Temperature Report",
"name": "tempReport",
"schema": {
"@type": "Object",
"fields": [
{
"displayName": "Max temperature",
"name": "maxTemp",
"schema": "double"
},
{
"displayName": "Min temperature",
"name": "minTemp",
"schema": "double"
},
{
"displayName": "Average Temperature",
"name": "avgTemp",
"schema": "double"
},
{
"displayName": "Start Time",
"name": "startTime",
"schema": "dateTime"
},
{
"displayName": "End Time",
"name": "endTime",
"schema": "dateTime"
}
]
}
}
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Customer Name",
"name": "CustomerName",
"schema": "string"
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Last Maintenance Date",
"name": "LastMaintenanceDate",
"schema": "dateTime"
}
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
}
}
对此请求的响应如下方示例所示：
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P4q/KxCU2xskrmk=\"",
"displayName": "Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;1",
"@type": "Interface",
"contents": [
{
"@type": [
"Telemetry",
"Temperature"
],
"description": "Temperature in degrees Celsius.",
"displayName": "Temperature",
"name": "temperature",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Allows to remotely specify the desired target temperature.",
"displayName": "Target Temperature",
"name": "targetTemperature",
"schema": "double",
"unit": "degreeCelsius",
"writable": true,
"decimalPlaces": 1,
"displayUnit": "C",
"maxValue": 80,
"minValue": 50
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Returns the max temperature since last device reboot.",
"displayName": "Max temperature since last reboot.",
"name": "maxTempSinceLastReboot",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": "Command",
"description": "This command returns the max, min and average temperature from the specified time to the current time.",
"displayName": "Get report",
"name": "getMaxMinReport",
"request": {
"@type": "CommandPayload",
"description": "Period to return the max-min report.",
"displayName": "Since",
"name": "since",
"schema": "dateTime"
},
"response": {
"@type": "CommandPayload",
"displayName": "Temperature Report",
"name": "tempReport",
"schema": {
"@type": "Object",
"fields": [
{
"displayName": "Max temperature",
"name": "maxTemp",
"schema": "double"
},
{
"displayName": "Min temperature",
"name": "minTemp",
"schema": "double"
},
{
"displayName": "Average Temperature",
"name": "avgTemp",
"schema": "double"
},
{
"displayName": "Start Time",
"name": "startTime",
"schema": "dateTime"
},
{
"displayName": "End Time",
"name": "endTime",
"schema": "dateTime"
}
]
}
}
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Customer Name",
"name": "CustomerName",
"schema": "string"
},
{
"@type": [
"Property",
"Cloud",
"DateTimeValue"
],
"displayName": "Last Maintenance Date",
"name": "LastMaintenanceDate",
"schema": "dateTime"
}
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
}
删除设备模板
使用以下请求删除设备模板：
DELETE https://{your app subdomain}/api/deviceTemplates/{deviceTemplateId}?api-version=2022-07-31
列出设备模板
使用以下请求从应用程序中检索设备模板的列表：
GET https://{your app subdomain}/api/deviceTemplates?api-version=2022-07-31
对此请求的响应如下方示例所示：
{
"value": [
{
"etag": "\"~F27cqSo0ON3bfOzwgZxAl89/JVvM80+dds6y8+mZh5M=\"",
"displayName": "Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;1",
"@type": "Interface",
"contents": [
{
"@type": [
"Telemetry",
"Temperature"
],
"description": "Temperature in degrees Celsius.",
"displayName": "Temperature",
"name": "temperature",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": [
"Property",
"Temperature",
"NumberValue"
],
"description": "Allows to remotely specify the desired target temperature.",
"displayName": "Target Temperature",
"name": "targetTemperature",
"schema": "double",
"unit": "degreeCelsius",
"writable": true,
"decimalPlaces": 1,
"displayUnit": "C",
"maxValue": 80,
"minValue": 50
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Returns the max temperature since last device reboot.",
"displayName": "Max temperature since last reboot.",
"name": "maxTempSinceLastReboot",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": "Command",
"description": "This command returns the max, min and average temperature from the specified time to the current time.",
"displayName": "Get report",
"name": "getMaxMinReport",
"request": {
"@type": "CommandPayload",
"description": "Period to return the max-min report.",
"displayName": "Since",
"name": "since",
"schema": "dateTime"
},
"response": {
"@type": "CommandPayload",
"displayName": "Temperature Report",
"name": "tempReport",
"schema": {
"@type": "Object",
"fields": [
{
"displayName": "Max temperature",
"name": "maxTemp",
"schema": "double"
},
{
"displayName": "Min temperature",
"name": "minTemp",
"schema": "double"
},
{
"displayName": "Average Temperature",
"name": "avgTemp",
"schema": "double"
},
{
"displayName": "Start Time",
"name": "startTime",
"schema": "dateTime"
},
{
"displayName": "End Time",
"name": "endTime",
"schema": "dateTime"
}
]
}
}
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Customer Name",
"name": "CustomerName",
"schema": "string"
}
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
},
{
"etag": "\"~XS5GovPNzJqFIwkkV/vyWW5U/6if2NwC/NqUlDxExAY=\"",
"displayName": "Thermostat2",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat2;1",
"@type": "Interface",
"contents": [
{
"@type": [
"Telemetry",
"Temperature"
],
"description": "Temperature in degrees Celsius.",
"displayName": "Temperature",
"name": "temperature",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": [
"Property",
"Temperature",
"NumberValue"
],
"description": "Allows to remotely specify the desired target temperature.",
"displayName": "Target Temperature",
"name": "targetTemperature",
"schema": "double",
"unit": "degreeCelsius",
"writable": true,
"decimalPlaces": 1,
"displayUnit": "C",
"maxValue": 80,
"minValue": 50
},
{
"@type": [
"Property",
"Temperature"
],
"description": "Returns the max temperature since last device reboot.",
"displayName": "Max temperature since last reboot.",
"name": "maxTempSinceLastReboot",
"schema": "double",
"unit": "degreeCelsius"
},
{
"@type": "Command",
"description": "This command returns the max, min and average temperature from the specified time to the current time.",
"displayName": "Get report",
"name": "getMaxMinReport",
"request": {
"@type": "CommandPayload",
"description": "Period to return the max-min report.",
"displayName": "Since",
"name": "since",
"schema": "dateTime"
},
"response": {
"@type": "CommandPayload",
"displayName": "Temperature Report",
"name": "tempReport",
"schema": {
"@type": "Object",
"fields": [
{
"displayName": "Max temperature",
"name": "maxTemp",
"schema": "double"
},
{
"displayName": "Min temperature",
"name": "minTemp",
"schema": "double"
},
{
"displayName": "Average Temperature",
"name": "avgTemp",
"schema": "double"
},
{
"displayName": "Start Time",
"name": "startTime",
"schema": "dateTime"
},
{
"displayName": "End Time",
"name": "endTime",
"schema": "dateTime"
}
]
}
}
},
{
"@type": [
"Property",
"Cloud",
"StringValue"
],
"displayName": "Customer Name",
"name": "CustomerName",
"schema": "string"
}
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u67",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
}
]
}
使用 ODATA 筛选器
在 API (api-version=2022-10-31-preview) 的预览版本中，可以使用 ODATA 筛选器对列表设备模板 API 返回的结果进行筛选和排序。
maxpagesize
使用 maxpagesize 筛选器设置结果大小。 返回的最大结果大小为 100，默认大小为 25。
使用以下请求从应用程序中检索前 10 个设备模板：
GET https://{your app subdomain}/api/deviceTemplates?api-version=2022-10-31-preview&maxpagesize=10
对此请求的响应如下方示例所示：
{
"value": [
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P4q/KxCU2xskrmk=\"",
"displayName": "Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
},
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P4q/KxCU2xskrmk=\"",
"displayName": "Thermostat3",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;3",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat3"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;3",
"dtmi:dtdl:context;2"
]
},
// ...
],
"nextLink": "https://{your app subdomain}.azureiotcentral.com/api/deviceTemplates?api-version=2022-07-31&%24top=1&%24skiptoken=%7B%22token%22%3A%22%2BRID%3A%7EJWYqAKZQKp20qCoAAAAACA%3D%3D%23RT%3A1%23TRC%3A1%23ISV%3A2%23IEO%3A65551%23QCF%3A4%22%2C%22range%22%3A%7B%22min%22%3A%2205C1DFFFFFFFFC%22%2C%22max%22%3A%22FF%22%7D%7D"
}
响应包含 nextLink 值，该值可用于检索下一页结果。
filter
使用 筛选器 创建用于筛选设备模板列表的表达式。 下表显示了可以使用的比较运算符：
| 比较运算符 | 符号 | 示例 |
|---|---|---|
| 等于 | eq | '@id' eq 'dtmi:example:test;1' |
| 不等于 | ne | displayName ne 'template 1' |
| 小于或等于 | le | displayName le 'template A' |
| 小于 | lt | displayName lt 'template B' |
| 大于或等于 | ge | displayName ge 'template A' |
| 大于 | gt | displayName gt 'template B' |
下表显示了可在 筛选器 表达式中使用的逻辑运算符：
| 逻辑运算符 | 符号 | 示例 |
|---|---|---|
| AND | 和 | '@id' eq 'dtmi:example:test;1' and capabilityModelId eq 'dtmi:example:test:model1;1' |
| OR | 或 | '@id' eq 'dtmi:example:test;1' or displayName ge 'template' |
目前， 筛选器 适用于以下设备模板字段：
| FieldName | 类型 | 说明 |
|---|---|---|
@id |
字符串 | 设备模板 ID |
displayName |
字符串 | 设备模板显示名称 |
capabilityModelId |
字符串 | 设备模板功能模型 ID |
筛选器支持的函数：
目前，设备模板列表唯一支持的筛选器函数是 contains 函数：
filter=contains(displayName, 'template1')
下面的示例演示如何检索显示名称包含字符串 thermostat 的所有设备模板：
GET https://{your app subdomain}/api/deviceTemplates?api-version=2022-10-31-preview&filter=contains(displayName, 'thermostat')
对此请求的响应如下方示例所示：
{
"value": [
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P4q/KxCU2xskrmk=\"",
"displayName": "Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:Thermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
},
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P46/KxCU2xskrmk=\"",
"displayName": "Room Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:RoomThermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current room temperature and provides desired temperature control.",
"displayName": "Room Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u7",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
},
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P7q/KxCU2xskrmk=\"",
"displayName": "Vehicle Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:VehicleThermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current vehicle temperature and provides desired temperature control.",
"displayName": "Vehicle Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lt7u39u7",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
}
]
}
orderby
使用 orderby 对结果进行排序。 目前， orderby 仅允许在 displayName 上排序。 默认情况下， orderby 按升序排序。 使用 desc 按降序排序，例如：
orderby=displayName
orderby=displayName desc
下面的示例演示如何检索结果按 displayName 排序的所有设备模板：
GET https://{your app subdomain}/api/deviceTemplates?api-version=2022-10-31-preview&orderby=displayName
对此请求的响应如下方示例所示：
{
"value": [
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P4q/KxCU2xskrmk=\"",
"displayName": "Aircon Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:AirconThermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
},
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P46/KxCU2xskrmk=\"",
"displayName": "Room Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:RoomThermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current room temperature and provides desired temperature control.",
"displayName": "Room Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u7",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
},
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P7q/KxCU2xskrmk=\"",
"displayName": "Vehicle Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:VehicleThermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current vehicle temperature and provides desired temperature control.",
"displayName": "Vehicle Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lt7u39u7",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
}
]
}
还可以合并两个或多个筛选器。
下面的示例演示如何检索显示名称包含字符串 thermostat 的前两个设备模板。
GET https://{your app subdomain}/api/deviceTemplates?api-version=2022-10-31-preview&filter=contains(displayName, 'thermostat')&maxpagesize=2
对此请求的响应如下方示例所示：
{
"value": [
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P4q/KxCU2xskrmk=\"",
"displayName": "Aircon Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:AirconThermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current temperature and provides desired temperature control.",
"displayName": "Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u6",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
},
{
"etag": "\"~6Ku691rHAgw/yw8u+ygZJGAKjSN4P46/KxCU2xskrmk=\"",
"displayName": "Room Thermostat",
"capabilityModel": {
"@id": "dtmi:contoso:RoomThermostat;1",
"@type": "Interface",
"contents": [
...
],
"description": "Reports current room temperature and provides desired temperature control.",
"displayName": "Room Thermostat"
},
"@id": "dtmi:modelDefinition:spzeut3n:n2lteu39u7",
"@type": [
"ModelDefinition",
"DeviceModel"
],
"@context": [
"dtmi:iotcentral:context;2",
"dtmi:dtdl:context;2"
]
}
]
}
后续步骤
现在你已了解如何使用 REST API 管理设备模板，建议接下来了解如何通过 IoT Central GUI 创建设备模板。