# Welcome to your Convex functions directory!

Write your Convex functions here.
See https://docs.convex.dev/functions for more.

A query function that takes two arguments looks like:

```ts
// convex/myFunctions.ts
import { query } from "./_generated/server"
import { v } from "convex/values"

export const myQueryFunction = query({
  // Validators for arguments.
  args: {
    first: v.number(),
    second: v.string(),
  },

  // Function implementation.
  handler: async (ctx, args) => {
    // Read the database as many times as you need here.
    // See https://docs.convex.dev/database/reading-data.
    const documents = await ctx.db.query("tablename").collect()

    // Arguments passed from the client are properties of the args object.
    console.log(args.first, args.second)

    // Write arbitrary JavaScript here: filter, aggregate, build derived data,
    // remove non-public properties, or create new objects.
    return documents
  },
})
```

Using this query function in a React component looks like:

```ts
const data = useQuery(api.myFunctions.myQueryFunction, {
  first: 10,
  second: "hello",
})
```

A mutation function looks like:

```ts
// convex/myFunctions.ts
import { mutation } from "./_generated/server"
import { v } from "convex/values"

export const myMutationFunction = mutation({
  // Validators for arguments.
  args: {
    first: v.string(),
    second: v.string(),
  },

  // Function implementation.
  handler: async (ctx, args) => {
    // Insert or modify documents in the database here.
    // Mutations can also read from the database like queries.
    // See https://docs.convex.dev/database/writing-data.
    const message = { body: args.first, author: args.second }
    const id = await ctx.db.insert("messages", message)

    // Optionally, return a value from your mutation.
    return await ctx.db.get(id)
  },
})
```

Using this mutation function in a React component looks like:

```ts
const mutation = useMutation(api.myFunctions.myMutationFunction)
function handleButtonPress() {
  // fire and forget, the most common way to use mutations
  mutation({ first: "Hello!", second: "me" })
  // OR
  // use the result once the mutation has completed
  mutation({ first: "Hello!", second: "me" }).then(result => console.log(result))
}
```

Use the Convex CLI to push your functions to a deployment. See everything
the Convex CLI can do by running `bunx convex -h` in your project root
directory. To learn more, launch the docs with `bunx convex docs`.