The JSON DAT converts and filters JSON text using JSONPath syntax and outputs the filtered results. It eliminates having to code scripts to parse and manipulate JSON, and keeps the data flow procedural.

It expects JSON text as input and converts the input to a Python object in the DAT.source member.

It then filters the JSON down using the JSONPath Filter parameter, and it outputs the resulting data from the DAT as JSON text.

It also puts the filtered results as DAT.results (a Python list of results) and DAT.result (the first result).

You can test expressions on DAT.source, DAT.result and DAT.results by setting the Output menu to Expression and using expressions like me.result['city'], which outputs the evaluated expression from the DAT. You can then use that expression as op('json1').result['city'] in an expression elsewhere. DAT.expr is also a member of the JSON DAT, for example, op('json1').expr returns the evaluated expression parameter.

Output tables: The JSON DAT can output a table by setting the Output Format menu to Table. It will do its best to take the result of the JSON Filter and form rows and columns of values and headings in a DAT table. Any cell than can't be expressed as a simple string, integer, float or boolean will be left as the JSON string of the remainder. A cell or range of cells can be further reduced with a Select DAT and then passed to another JSON DAT which can convert the JSON strings to a table.

See also: JSONPath, OP Snippets, and the TDJSON functions for converting and manipulating JSON data.


Parameters - JSON Page

Filter filter - A filter string following JSONPath syntax that will be used to filter the input JSON.

Output output - - Select the output of the JSON DAT.

  • Filter Result filterresult - Outputs list returned from applying the filter to the JSON text input.
  • Expression expression - Output a custom expression.

Expression expression - The custom expression to output

Format Output formatoutput - When enabled, the output of the DAT will formatted with indents and newlines.

Hold Last Non-Empty Results holdlast - When enabled, the most recent result will be held if the results become empty, in effect only new non-empty results will update the output.

Parameters - Common Page

Language language - - Select how the DAT decides which script language to operate on.

  • Input input - The DAT uses the inputs script language.
  • Node node - The DAT uses it's own script language.

Edit/View Extension extension - - Select the file extension this DAT should expose to external editors.

  • dat dat - various common file extensions.
  • frag frag -
  • glsl glsl -
  • html html -
  • md md -
  • py py -
  • rtf rtf -
  • tsv tsv -
  • txt txt -
  • vert vert -
  • xml xml -
  • From Language languageext - pick extension from DATs script language.
  • Custom Extension customext - Specify a custom extension.

Custom Extension customext - Specifiy the custom extension.

Word Wrap wordwrap - - Enable Word Wrap for Node Display.

  • Input input - The DAT uses the inputs setting.
  • On on - Turn on Word Wrap.
  • Off off - Turn off Word Wrap.

Operator Inputs

  • Input 0: - A JSON text input.

Info CHOP Channels

Extra Information for the JSON DAT can be accessed via an Info CHOP.

Common DAT Info Channels

  • num_rows - Number of rows in this DAT.
  • num_cols - Number of columns in this DAT.

Common Operator Info Channels

  • total_cooks - Number of times the operator has cooked since the process started.
  • cook_time - Duration of the last cook in milliseconds.
  • cook_frame - Frame number when this operator was last cooked relative to the component timeline.
  • cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.
  • cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.
  • cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.
  • cooked_this_frame - 1 if operator was cooked this frame.
  • warnings - Number of warnings in this operator if any.
  • errors - Number of errors in this operator if any.

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