Hi,
I am just updating my mod from 1.20.1 to 1.20.2 and I saw a big change for the custom RecipeSerializers, they now require Codec<?> serialization instead of a simple fromJson() function.
Unfortunately, I am struggling with setting up the Codec for a few of the serialization features:

- Using the Forge "mod_loaded" condition (the file should not be loaded when a mod is missing)

- Loading an Ingredient field 

Current Codec Code:

Spoiler

    public static final Codec<EnvironmentData> CODEC = RecordCodecBuilder.create((builder) -> builder
            .group(
                Ingredient.CODEC_NONEMPTY.fieldOf("input").forGetter(EnvironmentData::getInputItem),
                BlockState.CODEC.fieldOf("render").forGetter(EnvironmentData::getRenderState),
                Codec.FLOAT.fieldOf("growModifier").forGetter(EnvironmentData::getGrowModifier),
                Codec.list(Codec.STRING).fieldOf("categories").forGetter(EnvironmentData::getCategories)
            ).apply(builder, EnvironmentData::new));

For the first problem, previously the "mod_loaded" condition was automatically taken into account, but I suppose that now it changed and has to be taken care of in the codec?
For the second problem, I am trying to read the Ingredient with the CODEC_NONEMPTY from the Ingredient class, but I get the following error:

[17:35:14] [Render thread/ERROR] [minecraft/RecipeManager]: Parsing error loading recipe cagedmobs:environments/red_mushroom_block
com.google.gson.JsonParseException: Not a JSON object: "minecraft:red_mushroom_block"
	at net.minecraft.Util.getOrThrow(Util.java:820) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading}
	at net.minecraft.world.item.crafting.RecipeManager.fromJson(RecipeManager.java:171) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading}
	at net.minecraft.world.item.crafting.RecipeManager.apply(RecipeManager.java:76) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading}
	at net.minecraft.world.item.crafting.RecipeManager.apply(RecipeManager.java:37) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading}
	at net.minecraft.server.packs.resources.SimplePreparableReloadListener.lambda$reload$1(SimplePreparableReloadListener.java:12) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading}
	at java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:718) ~[?:?] {}
	at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?] {}
	at net.minecraft.server.packs.resources.SimpleReloadInstance.lambda$new$3(SimpleReloadInstance.java:65) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading}
	at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:166) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:22) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading}
	at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:132) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:145) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.client.gui.screens.worldselection.CreateWorldScreen.openFresh(CreateWorldScreen.java:132) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screens.worldselection.WorldSelectionList.loadLevels(WorldSelectionList.java:189) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screens.worldselection.WorldSelectionList.<init>(WorldSelectionList.java:100) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screens.worldselection.SelectWorldScreen.init(SelectWorldScreen.java:37) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screens.Screen.init(Screen.java:338) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.setScreen(Minecraft.java:1090) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screens.TitleScreen.lambda$createNormalMenuOptions$7(TitleScreen.java:171) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.components.Button.onPress(Button.java:38) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.components.AbstractButton.onClick(AbstractButton.java:41) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.components.AbstractWidget.mouseClicked(AbstractWidget.java:179) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.components.events.ContainerEventHandler.mouseClicked(ContainerEventHandler.java:53) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screens.TitleScreen.mouseClicked(TitleScreen.java:329) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHandler.lambda$onPress$0(MouseHandler.java:98) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.gui.screens.Screen.wrapScreenError(Screen.java:461) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHandler.onPress(MouseHandler.java:95) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MouseHandler.lambda$setup$4(MouseHandler.java:207) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.util.thread.BlockableEventLoop.execute(BlockableEventLoop.java:106) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.client.MouseHandler.lambda$setup$5(MouseHandler.java:206) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:43) ~[lwjgl-glfw-3.3.2.jar:build 13] {}
	at org.lwjgl.system.JNI.invokeV(Native Method) ~[lwjgl-3.3.2.jar:build 13] {}
	at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3509) ~[lwjgl-glfw-3.3.2.jar:build 13] {}
	at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(RenderSystem.java:207) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1261) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.run(Minecraft.java:783) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:221) ~[forge-1.20.2-48.0.33_mapped_parchment_2023.10.22-1.20.2-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
	at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
	at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:98) ~[fmlloader-1.20.2-48.0.33.jar:?] {}
	at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.lambda$makeService$0(CommonLaunchHandler.java:82) ~[fmlloader-1.20.2-48.0.33.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:17) ~[modlauncher-10.1.1.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:40) ~[modlauncher-10.1.1.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:58) ~[modlauncher-10.1.1.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:96) ~[modlauncher-10.1.1.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) ~[modlauncher-10.1.1.jar:?] {}
	at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:13) ~[modlauncher-10.1.1.jar:?] {}
	at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:10) ~[modlauncher-10.1.1.jar:?] {}
	at net.minecraftforge.bootstrap.BootstrapLauncher.main(BootstrapLauncher.java:126) ~[bootstrap-1.2.0.jar:?] {}

 

The "cagedmobs:environments/red_mushroom_block" JSON recipe:

Spoiler

{
	"type": "cagedmobs:environment_data",
	"conditions": [
		{
			"type": "forge:mod_loaded",
			"modid": "cagedmobs"
		}
	],
	"input": {
		"item": "minecraft:red_mushroom_block"
	},
	"render": "minecraft:red_mushroom_block",
	"growModifier": 1.0,
	"categories": ["mycelium"]
}

As seen here, the Ingredient input item is in the form of a nested JSON:

"input": {
		"item": "minecraft:red_mushroom_block"
}

 

 

Edited October 28, 20231 yr by Corgam

Please post the recipe "cagedmobs:environments/red_mushroom_block"

1 hour ago, Luis_ST said:

Please post the recipe "cagedmobs:environments/red_mushroom_block"

Updated the post with the correct recipe

The problem is not the 'input' field its' the 'render' field.
You expect there a BlockState but 'minecraft:red_mushroom_block' is a Block.

If you need no BlockState you can use ForgeRegistries.BLOCKS.getCodec() instead of BlockState.CODEC.
If you need explicit a BlockState take a look at the Codec which fields are required.

Edited October 29, 20231 yr by Luis_ST

Thank you, and what about the "mod_loaded" condition with Codecs?

16 hours ago, Corgam said:

Thank you, and what about the "mod_loaded" condition with Codecs?

The recipe conditions are added by Forge, there should be a codec from Forge somewhere that you can use.

There is, but I am not good at the codecs, how do I use them as conditional functions?

2 minutes ago, Corgam said:

how do I use them as conditional functions?

Can you please explain in more detail what you mean by that?