compareStrings

This event arises when the value of an item/expression corresponds to a condition set in this block. The compareStrings implements the same set of operators and works exactly the same way as the compareNumbers does.
When the data source is a device/item group, the event is stateless. It arises every time the condition is true, no matter which value of an event was previously. See Stateless comparison.
An expression or item type can be used instead of a constant item value.

Parameters
Example

Edit

Field	Type	Required	Description
blockOptions.method.args	object	+	Declares arguments of a condition block. Every key in args should correspond to a record in the fields array. The record in the fields array should have a name property equal to the value of a parameter in the args dictionary.
blockOptions.method.args.item blockOptions.method.args.expression	string	+	Argument declaration of value source name. The value should be in field block with nameitem.
blockOptions.method.args.item	string	–	Value source for the left part of the comparison operator. References the item by its ID. The name of the source should have a corresponding field block with a matching source name.
blockOptions.method.args.expression	string	–	Value source for the left part of the comparison operator. References an expression by its name.
blockOptions.method.args.deviceGroup	string	–	Value source for the left part of the comparison operator. References a device group by its ID. The itemGroup parameter is required.
blockOptions.method.args.itemGroup	string	–	Value source for the left part of the comparison operator. References an item group by its ID. The devicegroup parameter is required.
blockOptions.method.args.value	string	+	Argument declaration of a value to compare with. Could be a constant value or an expression reference or an item id. The value should be in field block with namevalue.
blockOptions.method.args.comparator	string	+	Argument declaration of comparator state. The value should be in field block with namecomparator. Possible comparators are ==, !=, >, >=, <, <=.

Edit

				
					"when" : [
    {
        "blockType":"when",
        "blockOptions":{
            "method":{
                "name":"compareStrings",
                "args":{
                    "item":"item",
                    "comparator":"comparator",
                    "value":"value"
                }
            }
        },
        "fields":[
            {
                "name":"item",
                "type":"item",
                "value":"5de64f6a70c7be0541cc0853"
            },
            {
                "name":"comparator",
                "type":"string",
                "value": ">"
            },
            {
                "name":"value",
                "type":"string",
                "value": "<value>"
            }
        ]
    }
]

In a case of expression, the value field should reference the existing expression by name:

				
					{
    "name":"value",
    "type":"expression",
    "value":"<expressionName>"
}