How can I make this possible?

[tahishae]

I'm making a map. I want the player to create a stone button but they are on adventure mode so i need a command that makes it possible to be placed on something so when they make the button it can be replaced with a button that can be placed on dirt.

[Marcee]

Is this what you wanted? (Gfycat Link)

This is the contraption I used:

1 is Repeat, Unconditional and Always Active

/testfor @p {Inventory:[{id:minecraft:stone_button}],CanPlaceOn:["minecraft:dirt"]}

2 is Repeat, Unconditional and Needs Redstone

/testfor @p {Inventory:[{id:minecraft:stone_button}]}

3 is Impulse, Unconditional and Needs Redstone

/clear @p stone_button

4 is Chain, Conditional and Always Active

/give @p minecraft:stone_button 1 0 {CanPlaceOn:["minecraft:dirt"]}