How do I get the document ID of a specific document in Firebase on React Native?-CodePudding

I'm working on a project that allows users to write anonymous letters addressed to people by name and I want to add a like/dislike functionality to the app. I was confused on how to get the specific document ID for that post and also incrementing the likeCount by 1 (in the areas where the "????" are at in the code below) ? I want it to update the field "likeCount" in firebase by 1 when the thumbs up icon is pressed.

This is the portion of my code that contains the posts (data from firebase) that is mapped for each firebase document:

 {posts.map((post, key) => {
            return (
              <View style={styles.postWrapper} key={key}>
                <View style={styles.btnWrapper}>
                  <View style={styles.likeBtn}>
                    <Icon
                      name="thumbs-up"
                      size={25}
                      color="#fff"

                      onPress={() => {
                        const postRef = doc(
                          db,
                          "posts",
                          `????`
                        );
                        updateDoc(postRef, {
                          likeCount: ????,
                        });
                      }}

                    />
                    <Text style={styles.likeCount}>{post.likeCount}</Text>
                  </View>
                  <Icon
                    name="thumbs-down"
                    size={25}
                    color="#fff"
                  />
                </View>
                <Card
                  containerStyle={{
                    backgroundColor: "rgba( 255, 255, 255, 0.5 )",
                    borderRadius: 50,
                    height: 300,
                    marginBottom: 25,
                    width: 330,
                    backdropFilter: "blur( 20px )",
                    padding: 20,
                  }}
                >
                  <Card.Title style={styles.notepadHeader}>Message.</Card.Title>

                  <View style={styles.center}>
                    <ScrollView>
                      <Text style={styles.notepadText}>
                        To: <Text style={styles.name}>{post.recipiant}</Text>
                      </Text>
                      <Text style={styles.notepadTextLetter}>
                        {post.letter}
                      </Text>
                      <Text style={styles.notepadFooter}>
                        From:{" "}
                        <Text
                          style={{
                            color: "#9e4aba",
                            fontSize: 20,
                          }}
                        >
                          {post.displayName}
                        </Text>
                      </Text>
                    </ScrollView>
                  </View>
                </Card>
              </View>
            );
          })}

CodePudding user response：

This will give you the particular doc and perform updateDoc query accordingly.

query(collections('collection_name), where(documentId(), '==', 'your_post_id'))

CodePudding user response：

It will be helpful if you can provide the structure of a post object and the definition for updateDoc method