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fix #203 by adding tip about doubling up ?

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Sean Corfield 2022-03-25 20:53:56 -07:00
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CHANGELOG.md
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@ -3,6 +3,7 @@
Only accretive/fixative changes will be made from now on. Only accretive/fixative changes will be made from now on.
* 1.2.next in progress * 1.2.next in progress
* Address [#203](https://github.com/seancorfield/next-jdbc/issues/203) by adding a note to the **PostgreSQL Tips & Tricks** section.
* Update `build-clj` to v0.8.0. * Update `build-clj` to v0.8.0.
* 1.2.772 -- 2022-02-09 * 1.2.772 -- 2022-02-09

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doc/tips-and-tricks.md
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@ -281,6 +281,8 @@ That call produces a vector `["fr"]` with metadata that implements `set-paramete
PostgreSQL has good support for [storing, querying and manipulating JSON data](https://www.postgresql.org/docs/current/datatype-json.html). Basic Clojure data structures (lists, vectors, and maps) transform pretty well to JSON data. With a little help `next.jdbc` can automatically convert Clojure data to JSON and back for us. PostgreSQL has good support for [storing, querying and manipulating JSON data](https://www.postgresql.org/docs/current/datatype-json.html). Basic Clojure data structures (lists, vectors, and maps) transform pretty well to JSON data. With a little help `next.jdbc` can automatically convert Clojure data to JSON and back for us.
> Note: some PostgreSQL JSONB operators have a `?` in them which conflicts with the standard parameter placeholder in SQL. You can write the JSONB operators by doubling up the `?`, e.g., `??|` instead of just `?|`. See [PostgreSQL JSONB operators](https://www.postgresql.org/docs/current/functions-json.html#FUNCTIONS-JSONB-OP-TABLE) for more detail.
First we define functions for JSON encoding and decoding. We're using [metosin/jsonista](https://github.com/metosin/jsonista) in these examples but you could use any JSON library, such as [Cheshire](https://github.com/dakrone/cheshire) or [clojure.data.json](https://github.com/clojure/data.json). First we define functions for JSON encoding and decoding. We're using [metosin/jsonista](https://github.com/metosin/jsonista) in these examples but you could use any JSON library, such as [Cheshire](https://github.com/dakrone/cheshire) or [clojure.data.json](https://github.com/clojure/data.json).
```clojure ```clojure