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22 lines
1.3 KiB
Plaintext
22 lines
1.3 KiB
Plaintext
{
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"name": "get_feature",
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"type": "function",
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"groups": ["Record and Attributes"],
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"description": "Returns the first feature of a layer matching a given attribute value.",
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"variants": [
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{ "variant": "Single value variant",
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"variant_description": "Along with the layer ID, a single column and value are specified.",
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"arguments": [ {"arg":"layer","description":"layer name or ID"},
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{"arg":"attribute","description":"attribute name to use for the match"},
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{"arg":"value","description":"attribute value to match"}],
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"examples": [ { "expression":"get_feature('streets','name','main st')", "returns":"first feature found in \"streets\" layer with \"main st\" value in the \"name\" field"} ]
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},
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{
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"variant": "Map variant",
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"variant_description": "Along with the layer ID, a map containing the columns (key) and their respective value to be used.",
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"arguments": [ {"arg":"layer","description":"layer name or ID"},
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{"arg":"map","description":"Map containing the column and value pairs to use"}],
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"examples": [ { "expression":"get_feature('streets',map('name','main st','lane_num','4'))", "returns":"first feature found in \"streets\" layer with \"main st\" value in the \"name\" field and \"4\" value in the \"lane_num\" field"} ]
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} ]
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}
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