set Check method is not working in statement inputs when i am passing any custom_block as type in setcheck("position")

[manish-kumar-01]

[sfuller]

Could you add an example of your code that is having the problem?

[manish-kumar-01]

Blockly.Block["trajectory"] = {
init: function () {
    this.appendDummyInput().appendField("Trajectory");
    this.appendDummyInput()
      .appendField("Name")
      .appendField(new Blockly.FieldTextInput("Traj_"), "NAME");
    this.appendStatementInput("stm_holder").setCheck('position')
    .appendField();
    this.setPreviousStatement(true, null);
    this.setNextStatement(true, null);
    this.setColour(165);
    this.setTooltip("");
    this.setHelpUrl("");
  },
  }

Blockly.Blocks["position"] = {
  init: function () {
    this.appendDummyInput()
        .appendField("Position (TCP Jog)");
    this.appendDummyInput()
        .appendField("Name")
        .appendField(new Blockly.FieldTextInput("Pos_"), "NAME");
    this.setPreviousStatement(true, null);
    this.setNextStatement(true, null);
    this.setTooltip("");
    this.setHelpUrl("");
  }
}

In this above block(Trajectory), I want to connect only the "position" block in its statementInput for that I have added setCheck method also. But despite that, every block is getting connected (those who has previousStatement = true).

I can not put check in position's block previous Statement, because position block can be connected with other Blocks

[sfuller]

Just a guess, but I believe your "position" block's init function is missing a this.setOutput call. Adding this.setOutput('position') will set the return type of your position block to a position.

More Info: https://developers.google.com/blockly/guides/create-custom-blocks/type-checks

Also, this doesn't seem to be related to this repo's react bindings for Blockly. In the future, You might have an easier time finding an answer by asking a question on StackOverflow, given you include the example code and explanation like you have done here.

[madalinaaftanase]

Just a guess, but I believe your "position" block's init function is missing a this.setOutput call. Adding this.setOutput('position') will set the return type of your position block to a position.

"A block with a previous connector cannot have an output connector, and vice versa. The term statement block refers to a block with no value output. A statement block will usually have both a previous connection and a next connection."

I have the same problem as @manish-kumar-01 . Did you find any solution?