Bump to 0.1.2: strip null-valued optional fields from JSON request bodies

Twitter's /2/tweets (and other strict X endpoints) reject payloads
that carry optional fields as explicit null.  The generated toJSON
always emitted every ?T field, which made valid-looking Motoko
calls unable to produce accepted requests.

This regen swaps the JSON serialisation dependency from serde@3.5.0
to serde-core@0.1.0 (a fork carrying NatLabs/serde#44) and threads
`?{ Candid.defaultOptions with skip_null_fields = true }` through
every JSON.toText call in the API layer.  Null-valued entries are
now omitted from outbound JSON, matching how external schemas read
"field absent".

Public Motoko API of this client is unchanged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ggreif

CHANGELOG.md

@@ -0,0 +1,23 @@
+# Changelog
+
+All notable changes to this package are documented in this file.
+The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.2](https://github.com/caffeinelabs/x-client/releases/tag/v0.1.2) — 2026-04-21
+
+### Fixed
+
+- Request bodies no longer emit `"field": null` for optional fields that the
+  caller left unset.  Twitter's `/2/tweets` (and other strict-validation X
+  endpoints) reject explicit `null` values for typed optionals — the generated
+  client was therefore unable to produce a valid tweet payload. The null
+  entries are now omitted entirely, matching how external schemas interpret
+  "field absent".
+
+### Changed
+
+- Depend on `serde-core@0.1.0` (a fork of `serde@3.5.0` carrying the
+  `skip_null_fields` JSON option pending [NatLabs/serde#44](https://github.com/NatLabs/serde/pull/44))
+  instead of `serde@3.5.0`. The public Motoko API of this client is
+  unchanged.

README.md

@@ -8,6 +8,7 @@ This Motoko client was generated by the [OpenAPI Generator](https://openapi-gene
 - Generator version: 7.22.0-SNAPSHOT
 - Build package: org.openapitools.codegen.languages.MotokoClientCodegen
 
+
 ## Models
 
 - ActivityStreamingResponse

mops.lock

@@ -3,17 +3,17 @@ moc = "1.4.1"
 
 [package]
 name = "x-client"
-version = "0.1.1"
+version = "0.1.2"
 description = "Generated Motoko client for X API v2"
 repository = "https://github.com/caffeinelabs/x-client"
 license = "Apache-2.0"
 files = ["src/Config.mo", "src/Apis/**/*.mo", "src/Models/**/*.mo"]
 
 [dependencies]
 core = "2.4.0"
-serde = "3.5.0"
+serde-core = "0.1.0" # ggreif/serde fork with skip_null_fields (NatLabs/serde#44)
 "cbor@4.1.0" = "4.1.0"
-"itertools@0.2.2" = "0.2.2" # because for serde
-base = "0.16.0" # because serde uses json.mo submodule
+"itertools@0.2.2" = "0.2.2" # because for serde-core
+base = "0.16.0" # because serde-core uses json.mo submodule
 xtended-numbers = "2.3.0"
 "sha2@0.1.6" = "0.1.6"

mops.toml

@@ -6,7 +6,7 @@ import Blob "mo:core/Blob";
 import Array "mo:core/Array";
 import Error "mo:core/Error";
 import Base64 "mo:core/Base64";
-import { JSON } "mo:serde";
+import { JSON; Candid } "mo:serde-core";
 import { type Error_; JSON = Error_ } "../Models/Error_";
 import { type Problem; JSON = Problem } "../Models/Problem";
 import { type ReplayJobCreateResponse; JSON = ReplayJobCreateResponse } "../Models/ReplayJobCreateResponse";
@@ -205,7 +205,7 @@ module {
             body = do ? {
                 let jsonValue = body;
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, [], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, [], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };

src/Apis/AccountActivityApi.mo

@@ -6,7 +6,7 @@ import Blob "mo:core/Blob";
 import Array "mo:core/Array";
 import Error "mo:core/Error";
 import Base64 "mo:core/Base64";
-import { JSON } "mo:serde";
+import { JSON; Candid } "mo:serde-core";
 import { type ActivityStreamingResponse; JSON = ActivityStreamingResponse } "../Models/ActivityStreamingResponse";
 import { type ActivitySubscriptionCreateRequest; JSON = ActivitySubscriptionCreateRequest } "../Models/ActivitySubscriptionCreateRequest";
 import { type ActivitySubscriptionCreateResponse; JSON = ActivitySubscriptionCreateResponse } "../Models/ActivitySubscriptionCreateResponse";
@@ -204,7 +204,7 @@ module {
             body = do ? {
                 let jsonValue = ActivitySubscriptionCreateRequest.toJSON(activitySubscriptionCreateRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["event_type", "filter", "tag", "webhook_id"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["event_type", "filter", "tag", "webhook_id"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -521,7 +521,7 @@ module {
             body = do ? {
                 let jsonValue = ActivitySubscriptionUpdateRequest.toJSON(activitySubscriptionUpdateRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["tag", "webhook_id"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["tag", "webhook_id"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };

src/Apis/ActivityApi.mo

@@ -6,7 +6,7 @@ import Blob "mo:core/Blob";
 import Array "mo:core/Array";
 import Error "mo:core/Error";
 import Base64 "mo:core/Base64";
-import { JSON } "mo:serde";
+import { JSON; Candid } "mo:serde-core";
 import { type BookmarkAddRequest; JSON = BookmarkAddRequest } "../Models/BookmarkAddRequest";
 import { type BookmarkFolderPostsResponse; JSON = BookmarkFolderPostsResponse } "../Models/BookmarkFolderPostsResponse";
 import { type BookmarkFoldersResponse; JSON = BookmarkFoldersResponse } "../Models/BookmarkFoldersResponse";
@@ -105,7 +105,7 @@ module {
             body = do ? {
                 let jsonValue = BookmarkAddRequest.toJSON(bookmarkAddRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["tweet_id"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["tweet_id"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };

src/Apis/BookmarksApi.mo

@@ -6,7 +6,7 @@ import Blob "mo:core/Blob";
 import Array "mo:core/Array";
 import Error "mo:core/Error";
 import Base64 "mo:core/Base64";
-import { JSON } "mo:serde";
+import { JSON; Candid } "mo:serde-core";
 import { type ChatAddGroupMembersRequest; JSON = ChatAddGroupMembersRequest } "../Models/ChatAddGroupMembersRequest";
 import { type ChatAddGroupMembersResponse; JSON = ChatAddGroupMembersResponse } "../Models/ChatAddGroupMembersResponse";
 import { type ChatAddPublicKeyRequest; JSON = ChatAddPublicKeyRequest } "../Models/ChatAddPublicKeyRequest";
@@ -123,7 +123,7 @@ module {
             body = do ? {
                 let jsonValue = ChatAddGroupMembersRequest.toJSON(chatAddGroupMembersRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["action_signatures", "conversation_key_version", "conversation_participant_keys", "encrypted_avatar_url", "encrypted_title", "user_ids"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["action_signatures", "conversation_key_version", "conversation_participant_keys", "encrypted_avatar_url", "encrypted_title", "user_ids"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -232,7 +232,7 @@ module {
             body = do ? {
                 let jsonValue = ChatAddPublicKeyRequest.toJSON(chatAddPublicKeyRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["generate_version", "public_key", "version"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["generate_version", "public_key", "version"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -441,7 +441,7 @@ module {
             body = do ? {
                 let jsonValue = ChatMediaUploadAppendRequest.toJSON(chatMediaUploadAppendRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_id", "media", "media_hash_key", "segment_index"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_id", "media", "media_hash_key", "segment_index"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -550,7 +550,7 @@ module {
             body = do ? {
                 let jsonValue = ChatMediaUploadFinalizeRequest.toJSON(chatMediaUploadFinalizeRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_id", "media_hash_key", "message_id", "num_parts", "ttl_msec"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_id", "media_hash_key", "message_id", "num_parts", "ttl_msec"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -658,7 +658,7 @@ module {
             body = do ? {
                 let jsonValue = ChatMediaUploadInitializeRequest.toJSON(chatMediaUploadInitializeRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_id", "total_bytes"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_id", "total_bytes"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -766,7 +766,7 @@ module {
             body = do ? {
                 let jsonValue = ChatCreateConversationRequest.toJSON(chatCreateConversationRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["action_signatures", "base64_encoded_key_rotation", "conversation_id", "conversation_key_version", "conversation_participant_keys", "group_admins", "group_avatar_url", "group_description", "group_members", "group_name", "ttl_msec"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["action_signatures", "base64_encoded_key_rotation", "conversation_id", "conversation_key_version", "conversation_participant_keys", "group_admins", "group_avatar_url", "group_description", "group_members", "group_name", "ttl_msec"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -1293,7 +1293,7 @@ module {
             body = do ? {
                 let jsonValue = ChatInitializeConversationKeysRequest.toJSON(chatInitializeConversationKeysRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["action_signatures", "base64_encoded_key_rotation", "conversation_key_version", "conversation_participant_keys"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["action_signatures", "base64_encoded_key_rotation", "conversation_key_version", "conversation_participant_keys"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -1505,7 +1505,7 @@ module {
             body = do ? {
                 let jsonValue = ChatMarkConversationReadRequest.toJSON(chatMarkConversationReadRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["seen_until_sequence_id"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["seen_until_sequence_id"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -1614,7 +1614,7 @@ module {
             body = do ? {
                 let jsonValue = ChatSendMessageRequest.toJSON(chatSendMessageRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_token", "encoded_message_create_event", "encoded_message_event_signature", "message_id"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["conversation_token", "encoded_message_create_event", "encoded_message_event_signature", "message_id"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };

src/Apis/ChatApi.mo

@@ -6,7 +6,7 @@ import Blob "mo:core/Blob";
 import Array "mo:core/Array";
 import Error "mo:core/Error";
 import Base64 "mo:core/Base64";
-import { JSON } "mo:serde";
+import { JSON; Candid } "mo:serde-core";
 import { type Error_; JSON = Error_ } "../Models/Error_";
 import { type Get2CommunitiesIdResponse; JSON = Get2CommunitiesIdResponse } "../Models/Get2CommunitiesIdResponse";
 import { type Get2CommunitiesSearchResponse; JSON = Get2CommunitiesSearchResponse } "../Models/Get2CommunitiesSearchResponse";

src/Apis/CommunitiesApi.mo

@@ -6,7 +6,7 @@ import Blob "mo:core/Blob";
 import Array "mo:core/Array";
 import Error "mo:core/Error";
 import Base64 "mo:core/Base64";
-import { JSON } "mo:serde";
+import { JSON; Candid } "mo:serde-core";
 import { type CreateNoteRequest; JSON = CreateNoteRequest } "../Models/CreateNoteRequest";
 import { type CreateNoteResponse; JSON = CreateNoteResponse } "../Models/CreateNoteResponse";
 import { type DeleteNoteResponse; JSON = DeleteNoteResponse } "../Models/DeleteNoteResponse";
@@ -107,7 +107,7 @@ module {
             body = do ? {
                 let jsonValue = CreateNoteRequest.toJSON(createNoteRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["info", "post_id", "test_mode"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["info", "post_id", "test_mode"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };
@@ -319,7 +319,7 @@ module {
             body = do ? {
                 let jsonValue = EvaluateNoteRequest.toJSON(evaluateNoteRequest);
                 let candidBlob = to_candid(jsonValue);
-                let #ok(jsonText) = JSON.toText(candidBlob, ["note_text", "post_id"], null) else throw Error.reject("Failed to serialize to JSON");
+                let #ok(jsonText) = JSON.toText(candidBlob, ["note_text", "post_id"], ?{ Candid.defaultOptions with skip_null_fields = true }) else throw Error.reject("Failed to serialize to JSON");
                 Text.encodeUtf8(jsonText)
             };
         };