How to make Script scan childs in a folder to see if the child has a child named something?

[DevForumWanu10]

Hello, i want my code to scan the childs of a folder to see if the child of that folder has a child named “Something”. So then it can do something to that supposed “GrandChild?”. but i dont know how.
i have 10 plots and i want to check if each of those plots have a part/model in it so that it can turn its transparency and cancollide to 0 and true.
here is my local script code:

script.Parent.SelectPlotFrame.Visible = false

local plots = workspace.Plots

local plotButton = script.Parent:WaitForChild("PlotButton")

local selectingPlot = false

local camera = workspace.CurrentCamera




plotButton.MouseButton1Click:Connect(function()

	local ownedPlot = nil

	for i, plot in pairs(plots:GetChildren()) do

		if tonumber(plot.Owner.Value) == game.Players.LocalPlayer.UserId then

			ownedPlot = plot
		end
	end

	if ownedPlot then

		game.ReplicatedStorage.PlotSystemRE:FireServer("removePlot")

		plotButton.Text = "PLOTS"

		selectingPlot = false
		script.Parent.SelectPlotFrame.Visible = false

	else

		selectingPlot = not selectingPlot

		if selectingPlot then

			camera.CameraType = Enum.CameraType.Scriptable

			local plotsToSelect = {}

			for i, plot in pairs(plots:GetChildren()) do

				if plot.Owner.Value == "" then

					table.insert(plotsToSelect, plot)
				end
			end

			local currentPlot = 1

			script.Parent.SelectPlotFrame.PlotName.Text = plotsToSelect[currentPlot].Name

			camera.CFrame = CFrame.new(plotsToSelect[currentPlot].Position + Vector3.new(0, 70, 0) + plotsToSelect[currentPlot].CFrame.LookVector * 50, plotsToSelect[currentPlot].Position)

			script.Parent.SelectPlotFrame.LeftArrow.MouseButton1Click:Connect(function()

				currentPlot -= 1

				if currentPlot == 0 then currentPlot = #plotsToSelect end

				script.Parent.SelectPlotFrame.PlotName.Text = plotsToSelect[currentPlot].Name

				camera.CFrame = CFrame.new(plotsToSelect[currentPlot].Position + Vector3.new(0, 70, 0) + plotsToSelect[currentPlot].CFrame.LookVector * 50, plotsToSelect[currentPlot].Position)
			end)

			script.Parent.SelectPlotFrame.RightArrow.MouseButton1Click:Connect(function()

				currentPlot += 1

				if currentPlot == #plotsToSelect + 1 then currentPlot = 1 end

				script.Parent.SelectPlotFrame.PlotName.Text = plotsToSelect[currentPlot].Name

				camera.CFrame = CFrame.new(plotsToSelect[currentPlot].Position + Vector3.new(0, 70, 0) + plotsToSelect[currentPlot].CFrame.LookVector * 50, plotsToSelect[currentPlot].Position)
			end)
			script.Parent.SelectPlotFrame.Visible = true

		else

			camera.CameraType = Enum.CameraType.Custom
			script.Parent.SelectPlotFrame.Visible = false
		end
	end
end)

script.Parent.SelectPlotFrame.SelectPlotButton.MouseButton1Click:Connect(function()

	game.ReplicatedStorage.PlotSystemRE:FireServer("buyPlot", script.Parent.SelectPlotFrame.PlotName.Text)
end)



game.ReplicatedStorage.PlotSystemRE.OnClientEvent:Connect(function(instruction)

	plotButton.Text = "P"

	selectingPlot = false
	camera.CameraType = Enum.CameraType.Custom
	script.Parent.SelectPlotFrame.Visible = false
	script.Parent.Enabled = false

end)

my second normal script:

local plots = workspace:WaitForChild("Plots")


for i, plot in pairs(plots:GetChildren()) do

	local ownerValue = Instance.new("StringValue", plot)
	ownerValue.Name = "Owner"
end


local re = game.ReplicatedStorage:WaitForChild("PlotSystemRE")


re.OnServerEvent:Connect(function(plr, instruction, plotName)

	if instruction == "removePlot" then

		local playerPlot = nil

		for i, plot in pairs(plots:GetChildren()) do

			if tonumber(plot.Owner.Value) == plr.UserId then
				playerPlot = plot
			end
		end

		if playerPlot then

			playerPlot.Owner.Value = ""
		end

	elseif instruction == "buyPlot" then

		if plots:FindFirstChild(plotName) and plots[plotName].Owner.Value == "" then

			plots[plotName].Owner.Value = plr.UserId

			re:FireClient(plr)

			plr.Character.HumanoidRootPart.CFrame = plots[plotName].CFrame + Vector3.new(0, 10, 0)
		end
	end
end)


game.Players.PlayerRemoving:Connect(function(plr)

	for i, plot in pairs(plots:GetChildren()) do

		if tonumber(plot.Owner.Value) == plr.UserId then
			plot.Owner.Value = ""
				

				
		end
	end
end)

here is a picture:

[Weiomg2020 (Weiomg2023)]

You could use GetDescendants on the plots folder, it will return a table of all children, ‘grandchildren,’ etc. of the plots. You would want to loop through the table, and see if there is a part named “Something” and do something to that part.

local descendants = plots:GetDescendants()
for i=1, #descendants do
    local part = descendants[i]
    if part.Name == "Something" then
        --do something
    end
end

[RFL890 (GeorgeCatherington)]

local function findFirstDescendant(parent, descendantName) 
     local found
     for _, item in ipairs(parent:GetDescendants()) do 
         if item.Name == descendantName then found = item; break end
     end
     return found
end

You can call it like

local descendant = findFirstDescendant(workspace, "Part"); -- nil if not found

In your case, the first argument would be the plots folder and the second would be the name of the child

[3YbuKtOp (Alex_Kornilov)]

You need to use FindFirstChild recursion.
Example:

local part = plot:FindFirstChild("Name", true)

This searches recursively in your model/folder (or whatever you have) and if found you will get that part, otherwise nil

[DevForumWanu10]

It works but i dont know if i stated that i want the part to become visible ONLY when the plot is selected.
because for example, a part i want to become visible is it part9, when i join part9 it becomes visible, but it also becomes visible when you join plot8 7 6 ect. how do i make it so the part only becomes visible when that specific part/plot has been joined

[Weiomg2020 (Weiomg2023)]

Oh I see. Then you would probably want to only call GetDescendants on the plot that you have joined/selected.

So instead of plots:GetDescendants() you would use your selected plot and call GetDescendants on it.

[DevForumWanu10]

Im new to studio and my knowledge is limited, can you show me how to do it?

[3YbuKtOp (Alex_Kornilov)]

local plot = game.Workspace.Plots.Plot1 --For example, take 1 plot
for _, v in ipairs(plot:GetDescendants()) do
	if v.Name == "Name" then
		--action
	end
end

[DevForumWanu10]

yeah but how do i make it so the game automaticly checks which plot has been selected so it does that

[DevForumWanu10]

because i think if i do that code when you join a plot it automaticly does plot1 whilst you did plot9.

[3YbuKtOp (Alex_Kornilov)]

You need to store the playerplots somehow, either via Attribute or tables

[DevForumWanu10]

whats a attribute?
ik what a table is its for example {–blahblahblah–}

[3YbuKtOp (Alex_Kornilov)]

Attribute: Instance Attributes | Roblox Creator Documentation
You can assign your plot to a player via an attribute

Or create a Value (Object or Name) in the plot, where value is the player or the nickname of the player who owns the plot will be.

Or through tables

local playerplots = {}
playerplots["PlayerName"] = "Plot1"
print(playerplots["PlayerName"]) --> "Plot1"
playerplots["PlayerName"] = nil
print(playerplots["PlayerName"]) --> nil