Delete Row with MySQL API on New Links on a Subreddit from Reddit API

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New Links on a Subreddit from the Reddit API

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Delete Row with the MySQL API

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Getting Started#

This integration creates a workflow with a Reddit trigger and MySQL action. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

Select this integration
Configure the New Links on a Subreddit trigger
1. Connect your Reddit account
2. Configure Polling schedule
3. Select a Subreddit
Configure the Delete Row action
1. Connect your MySQL account
2. Select a Table
3. Configure Where condition
4. Configure Values
Deploy the workflow
Send a test event to validate your setup
Turn on the trigger

Details#

This integration uses pre-built, source-available components from Pipedream's GitHub repo. These components are developed by Pipedream and the community, and verified and maintained by Pipedream.

To contribute an update to an existing component or create a new component, create a PR on GitHub. If you're new to Pipedream component development, you can start with quickstarts for trigger span and action development, and then review the component API reference.

Trigger#

New Links on a Subreddit on Reddit

Description:Emit new event each time a new link is added to a subreddit

Version:0.1.0

Key:reddit-new-links-on-a-subreddit

View on GitHub

Reddit Overview#

The Reddit API unlocks the potential to automate interactions with one of the largest online communities. With Pipedream, you can tap into the Reddit ecosystem to monitor trends, engage with audiences, or curate content. Whether it's tracking mentions of your brand, auto-posting to subreddits, or gathering data for analysis, the API offers a breadth of functionalities — from getting posts and comments to creating new threads and managing account settings.

Trigger Code#

import common from "../common.mjs";
import get from "lodash/get.js";
const { reddit } = common.props;

export default {
  ...common,
  type: "source",
  key: "reddit-new-links-on-a-subreddit",
  name: "New Links on a Subreddit",
  description: "Emit new event each time a new link is added to a subreddit",
  version: "0.1.0",
  dedupe: "unique",
  props: {
    ...common.props,
    subreddit: {
      propDefinition: [
        reddit,
        "subreddit",
      ],
    },
  },
  hooks: {
    async deploy() {
      // Emits 10 sample events on the first run during deploy.
      const redditLinks = await this.reddit.getNewSubredditLinks(
        get(this.subreddit, "value", this.subreddit),
        {
          limit: 10,
        },
      );
      const { children: links = [] } = redditLinks.data;
      if (links.length === 0) {
        console.log("No data available, skipping iteration");
        return;
      }
      const { name: before = this._getBefore() } = links[0].data;
      this._setBefore(before);
      const previousEmittedEvents = {};
      const keys = [];
      links.reverse().forEach((event) => {
        this.emitRedditEvent(event);
        previousEmittedEvents[event.data.name] = true;
        keys.push(event.data.name);
      });
      this._setCache(previousEmittedEvents);
      this._setKeys(keys);
    },
  },
  methods: {
    ...common.methods,
    generateEventMetadata(redditEvent) {
      return {
        id: redditEvent.data.name,
        summary: redditEvent.data.title,
        ts: redditEvent.data.created,
      };
    },
    async isBeforeValid(before) {
      // verify this link still exists on the subreddit
      const { data } = await this.reddit.getSubredditByName(before);
      const isOnSubreddit = data?.children[0]?.data?.subreddit === this.subreddit?.value;
      return isOnSubreddit;
    },
  },
  async run() {
    let redditLinks;
    const {
      cache: previousEmittedEvents,
      keys,
    } = await this.validateBefore(this._getCache(),
      this._getBefore(),
      this._getKeys());
    do {
      redditLinks = await this.reddit.getNewSubredditLinks(
        get(this.subreddit, "value", this.subreddit),
        {
          before: this._getBefore(),
        },
      );
      const { children: links = [] } = redditLinks.data;
      if (links.length === 0) {
        console.log("No data available, skipping iteration");
        break;
      }
      const { name: before = this._getBefore() } = links[0].data;
      this._setBefore(before);

      links.reverse().forEach((event) => {
        if (!previousEmittedEvents[event.data.name]) {
          this.emitRedditEvent(event);
          previousEmittedEvents[event.data.name] = true;
          keys.push(event.data.name);
        }
      });
    } while (redditLinks);
    this._setCache(previousEmittedEvents);
    this._setKeys(keys);
  },
};

Trigger Configuration#

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI and CLI.

Label	Prop	Type	Description
Reddit	`reddit`	`app`	This component uses the Reddit app.
N/A	`db`	`$.service.db`	This component uses `$.service.db` to maintain state between executions.
Polling schedule	`timer`	`$.interface.timer`	Pipedream polls Reddit for events on this schedule.
Subreddit	`subreddit`	`string`	Select a value from the drop down menu.

Trigger Authentication#

Reddit uses OAuth authentication. When you connect your Reddit account, Pipedream will open a popup window where you can sign into Reddit and grant Pipedream permission to connect to your account. Pipedream securely stores and automatically refreshes the OAuth tokens so you can easily authenticate any Reddit API.

Pipedream requests the following authorization scopes when you connect your account:

accountidentityedithistoryreadsubmitmysubredditssubscribe

About Reddit#

Reddit is a network of communities based on people's interests. Find communities you're interested in, and become part of an online community!

Action#

Delete Row on MySQL

Description:Delete an existing row. [See the docs here](https://dev.mysql.com/doc/refman/8.0/en/delete.html)

Version:2.0.5

Key:mysql-delete-row

View on GitHub

MySQL Overview#

The MySQL application on Pipedream enables direct interaction with your MySQL databases, allowing you to perform CRUD operations—create, read, update, delete—on your data with ease. You can leverage these capabilities to automate data synchronization, report generation, and event-based triggers that kick off workflows in other apps. With Pipedream's serverless platform, you can connect MySQL to hundreds of other services without managing infrastructure, crafting complex code, or handling authentication.

Action Code#

import mysql from "../../mysql.app.mjs";

export default {
  key: "mysql-delete-row",
  name: "Delete Row",
  description: "Delete an existing row. [See the docs here](https://dev.mysql.com/doc/refman/8.0/en/delete.html)",
  type: "action",
  version: "2.0.5",
  props: {
    mysql,
    table: {
      description: "The table to delete a row from",
      propDefinition: [
        mysql,
        "table",
      ],
    },
    condition: {
      propDefinition: [
        mysql,
        "whereCondition",
      ],
    },
    values: {
      propDefinition: [
        mysql,
        "whereValues",
      ],
    },
  },
  async run({ $ }) {
    const {
      table,
      condition,
      values,
    } = this;

    const numberOfQuestionMarks = condition?.match(/\?/g)?.length;

    if (!numberOfQuestionMarks) {
      throw new Error("No valid condition provided. At least one question mark character ? must be provided.");
    }

    if (!Array.isArray(values)) {
      throw new Error("No valid values provided. The values property must be an array.");
    }

    if (values.length !== numberOfQuestionMarks) {
      throw new Error("The number of values provided does not match the number of question marks ? in the condition.");
    }

    const result = await this.mysql.deleteRows({
      table,
      condition,
      values,
    });

    $.export("$summary", `Successfully deleted ${result.affectedRows} row(s) from table ${table}`);

    return result;
  },
};

Action Configuration#

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI.

Label	Prop	Type	Description
MySQL	`mysql`	`app`	This component uses the MySQL app.
Table	`table`	`string`	Select a value from the drop down menu.
Where condition	`condition`	`string`	In this expression you can write your own conditions (eg. `column1 = ? or column2 = ?`). Depending on the number of `?` symbols likewise you need to add the same number of values.
Values	`values`	`string[]`	This is the list of values that will match every `?` symbol in the where expression. If you want to build yourself the values (eg. `{{["string1", "string2"]}}`)

Action Authentication#

MySQL uses API keys for authentication. When you connect your MySQL account, Pipedream securely stores the keys so you can easily authenticate to MySQL APIs in both code and no-code steps.

Connecting to Restricted Databases

Either enable the shared static IP for this account below, or configure a VPC to deploy any workflow in your workspace to a private network with a dedicated static IP. Learn more in our docs.

SSL Setup

Configure SSL on your MySQL database by providing the CA (Certificate Authority), and choosing between Full Verification, Verify Certificate Authority (CA), or Skip Verification. Skipping verification is not recommended as this has serious security implications.