質問編集履歴
3
ソースコードを追記して、指摘箇所を訂正しました。
test
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test
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@@ -16,6 +16,20 @@
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#### 実現したいこと&困っていること
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```
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ReferenceError: message is not defined
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```
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Message.jsの`messages: GiftedChat.append(previousState.messages, message),`でつっかえています。ここには、既にFirebaseに保存されているデータベースが取ってこれるはずなのですが、このmessageを取ってくることができなくて困っています。
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[こちらのソースコード](https://github.com/FaridSafi/ChatApp)をRedux仕様にして、チャット機能を実装したいのですが、保存は成功しているのですが
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@@ -24,11 +38,15 @@
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Fetchがうまくいきません。
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参考コードに忠実にしたがっているのですが、やはりmessageをfetchできません。
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-
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message2は下記のコンソール情報が取ってこれています。
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![イメージ説明](de07bfea46f399ec4ad8cc9e5e057c73.png)
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ここのvalueを一つずつmessageの中にsetStateしてあげたいのですが><
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@@ -60,6 +78,8 @@
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console.log('message3, message);
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this.setState((previousState) => {
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return {
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> messageReducer.js
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```JavaScript
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type uiActions = {
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type: 'messages_fetch_success',
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}
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const initialState = {};
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export default (state = initialState, action) => {
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switch (action.type) {
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case 'messages_fetch_success':
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return action.payload;
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default:
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return state;
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}
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};
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```
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> messageFormReducer.js
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```
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/**
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* @flow
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*
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* Manages the state of all Message Form components which rely on Redux
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*/
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type uiActions = {
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type: 'message_update',
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type: 'message_create,'
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}
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const initialState = {
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text: '',
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user: '',
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createdAt: '',
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_id: '',
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roomId: ''
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};
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export default (state = initialState, action) => {
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switch(action.type) {
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case 'message_update':
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return { ...state, [action.payload.prop]: action.payload.value };
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case 'message_create':
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return initialState;
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default:
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return state;
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}
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};
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```
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> store.js
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```
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const rootReducer = combineReducers({
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messages: messageReducer,
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messageForm: messageFormReducer
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});
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const store = createStore(
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rootReducer,
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applyMiddleware(reduxThunk)
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);
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export default store;
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```
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2
ソースコードの修正、エラーの詳細を追記しました
test
CHANGED
File without changes
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test
CHANGED
@@ -8,9 +8,7 @@
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8
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[Firebaseでチャット機能を実現したい(react native)](https://teratail.com/questions/122
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[Firebaseでチャット機能を実現したい(react native)](https://teratail.com/questions/121827)
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)
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[gifted chatでmessageをDBからFetchしたい(react native)](https://teratail.com/questions/122414)
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@@ -54,226 +52,242 @@
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component
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this.props.
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}
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componentWillMount() {
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const room = this.props.navigation.state.params.room;
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this.props.messagesFetch(room);
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this.setState((previousState) => {
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return {
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messages: GiftedChat.append(previousState.messages, message),
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};
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});
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}
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onSend = (message) => {
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const room = this.props.navigation.state.params.room;
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this.props.sendMessage({
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message,
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room
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});
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}
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renderBubble(props) {
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return (
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<Bubble
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{...props}
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wrapperStyle={{
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right: {
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backgroundColor: Theme.SECONDARY
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}
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}}
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/>
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)
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}
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renderSend(props) {
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return (
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<Send
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{...props}
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textStyle={{
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color: Theme.SECONDARY
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}}
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/>
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);
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}
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render() {
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const { currentUser } = firebase.auth();
|
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return (
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<Screen>
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<GiftedChat
|
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messages={this.state.messages}
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onSend={this.onSend.bind(this)}
|
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user={{
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_id: currentUser.uid
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}}
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renderBubble={this.renderBubble}
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renderSend={this.renderSend}
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/>
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</Screen>
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);
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}
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}
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const mapStateToProps = (state) => {
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const { text, user, createdAt, _id } = state.messageForm;
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return { text, user, createdAt, _id };
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};
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export default connect(mapStateToProps, {
|
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sendMessage,
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messagesFetch
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})(Message);
|
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|
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```
|
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|
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> redux/messageActions.js
|
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|
199
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+
|
200
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|
201
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```JavaScript
|
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|
203
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/**
|
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205
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* Builds an action to request
|
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*/
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209
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export const sendMessage = ({ message, room }) => {
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210
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const { currentUser } = firebase.auth();
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212
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|
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return (dispatch) => {
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215
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firebase.database().ref(`/rooms/${room.roomId}/messages/`)
|
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.push({
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text: message[0].text,
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user: message[0].user,
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createdAt: firebase.database.ServerValue.TIMESTAMP,
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})
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.then(() => {
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dispatch({ type: 'message_create' });
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});
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}
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}
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/**
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* Builds an action to notification fetch action
|
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*/
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export const messagesFetch = (room) => {
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246
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|
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return (dispatch) => {
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firebase.database().ref(`/rooms/${room.roomId}/messages/`)
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.once('value', snapshot => {
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const message = snapshot.val();
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return message;
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})
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.then(message => {
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dispatch({ type: 'messages_fetch_success', payload: message });
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console.log('message2', message);
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});
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};
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onSend = (message) => {
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80
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|
81
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const room = this.props.navigation.state.params.room;
|
82
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-
|
83
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this.props.sendMessage({
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message,
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room
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});
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}
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|
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|
95
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-
renderBubble(props) {
|
96
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-
|
97
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return (
|
98
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-
|
99
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<Bubble
|
100
|
-
|
101
|
-
{...props}
|
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|
-
|
103
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wrapperStyle={{
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-
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105
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right: {
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107
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backgroundColor: Theme.SECONDARY
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109
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}
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}}
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/>
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)
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}
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-
|
119
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-
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|
-
|
121
|
-
renderSend(props) {
|
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-
|
123
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-
return (
|
124
|
-
|
125
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-
<Send
|
126
|
-
|
127
|
-
{...props}
|
128
|
-
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textStyle={{
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-
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131
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color: Theme.SECONDARY
|
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-
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}}
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-
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-
/>
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136
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-
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-
);
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-
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-
}
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-
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-
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-
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-
render() {
|
144
|
-
|
145
|
-
const { currentUser } = firebase.auth();
|
146
|
-
|
147
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-
return (
|
148
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-
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149
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-
<Screen>
|
150
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-
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151
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-
<GiftedChat
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-
|
153
|
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messages={this.state.messages}
|
154
|
-
|
155
|
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onSend={this.onSend.bind(this)}
|
156
|
-
|
157
|
-
user={{
|
158
|
-
|
159
|
-
_id: currentUser.uid
|
160
|
-
|
161
|
-
}}
|
162
|
-
|
163
|
-
renderBubble={this.renderBubble}
|
164
|
-
|
165
|
-
renderSend={this.renderSend}
|
166
|
-
|
167
|
-
/>
|
168
|
-
|
169
|
-
</Screen>
|
170
|
-
|
171
|
-
);
|
172
|
-
|
173
|
-
}
|
174
|
-
|
175
|
-
}
|
176
|
-
|
177
|
-
|
178
|
-
|
179
|
-
const mapStateToProps = (state) => {
|
180
|
-
|
181
|
-
const { text, user, createdAt, _id } = state.messageForm;
|
182
|
-
|
183
|
-
return { text, user, createdAt, _id };
|
184
|
-
|
185
269
|
};
|
186
270
|
|
187
|
-
|
188
|
-
|
189
|
-
export default connect(mapStateToProps, {
|
190
|
-
|
191
|
-
sendMessage,
|
192
|
-
|
193
|
-
messagesFetch
|
194
|
-
|
195
|
-
})(Message);
|
196
|
-
|
197
271
|
```
|
198
272
|
|
199
|
-
> redux/messageActions.js
|
200
|
-
|
201
|
-
|
202
|
-
|
203
|
-
```JavaScript
|
204
|
-
|
205
|
-
/**
|
206
|
-
|
207
|
-
* Builds an action to request
|
208
|
-
|
209
|
-
*/
|
210
|
-
|
211
|
-
export const sendMessage = ({ message, room }) => {
|
212
|
-
|
213
|
-
const { currentUser } = firebase.auth();
|
214
|
-
|
215
|
-
return (dispatch) => {
|
216
|
-
|
217
|
-
firebase.database().ref(`/rooms/${room.roomId}/messages/`)
|
218
|
-
|
219
|
-
.push({
|
220
|
-
|
221
|
-
text: message[0].text,
|
222
|
-
|
223
|
-
user: message[0].user,
|
224
|
-
|
225
|
-
createdAt: firebase.database.ServerValue.TIMESTAMP,
|
226
|
-
|
227
|
-
})
|
228
|
-
|
229
|
-
.then(() => {
|
230
|
-
|
231
|
-
dispatch({ type: 'message_create' });
|
232
|
-
|
233
|
-
});
|
234
|
-
|
235
|
-
}
|
236
|
-
|
237
|
-
}
|
238
|
-
|
239
|
-
|
240
|
-
|
241
|
-
/**
|
242
|
-
|
243
|
-
* Builds an action to notification fetch action
|
244
|
-
|
245
|
-
*/
|
246
|
-
|
247
|
-
export const messagesFetch = (room) => {
|
248
|
-
|
249
|
-
return (dispatch) => {
|
250
|
-
|
251
|
-
firebase.database().ref(`/rooms/${room.roomId}/messages/`)
|
252
|
-
|
253
|
-
.once('value', snapshot => {
|
254
|
-
|
255
|
-
const message = snapshot.val();
|
256
|
-
|
257
|
-
return message;
|
258
|
-
|
259
|
-
console.log('message1', message);
|
260
|
-
|
261
|
-
})
|
262
|
-
|
263
|
-
.then(message => {
|
264
|
-
|
265
|
-
dispatch({ type: 'messages_fetch_success', payload: message });
|
266
|
-
|
267
|
-
console.log('message2', message);
|
268
|
-
|
269
|
-
});
|
270
|
-
|
271
|
-
};
|
272
|
-
|
273
|
-
};
|
274
|
-
|
275
|
-
```
|
276
|
-
|
277
273
|
|
278
274
|
|
279
275
|
meesage1, message2は取れて来ていますが、message3はエラーすら出ません(無視されている?)
|
276
|
+
|
277
|
+
|
278
|
+
|
279
|
+
#### 追記
|
280
|
+
|
281
|
+
|
282
|
+
|
283
|
+
componentDidMountを排除し、componentWillMountを使うことにしました。
|
284
|
+
|
285
|
+
message2は下記のコンソール情報が取ってこれています。
|
286
|
+
|
287
|
+
|
288
|
+
|
289
|
+
![イメージ説明](de07bfea46f399ec4ad8cc9e5e057c73.png)
|
290
|
+
|
291
|
+
|
292
|
+
|
293
|
+
ここのvalueを一つずつmessageの中にsetStateしてあげたいのですが><
|
1
プライベートな情報を排除しました!
test
CHANGED
File without changes
|
test
CHANGED
@@ -4,7 +4,7 @@
|
|
4
4
|
|
5
5
|
react nativeでチャット投稿を実現したいと思っています。
|
6
6
|
|
7
|
-
(これで3回目の質問になります。
|
7
|
+
(これで3回目の質問になります。)
|
8
8
|
|
9
9
|
|
10
10
|
|