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| 1 | +//! SQLite specific functions |
| 2 | +use crate::expression::functions::define_sql_function; |
| 3 | +use crate::sql_types::*; |
| 4 | +use crate::sqlite::expression::expression_methods::BinaryOrNullableBinary; |
| 5 | +use crate::sqlite::expression::expression_methods::MaybeNullableValue; |
| 6 | +use crate::sqlite::expression::expression_methods::TextOrNullableText; |
| 7 | + |
| 8 | +#[cfg(feature = "sqlite")] |
| 9 | +define_sql_function! { |
| 10 | + /// Verifies that its argument is a valid JSON string or JSONB blob and returns a minified |
| 11 | + /// version of that JSON string with all unnecessary whitespace removed. |
| 12 | + /// |
| 13 | + /// # Example |
| 14 | + /// |
| 15 | + /// ```rust |
| 16 | + /// # include!("../../doctest_setup.rs"); |
| 17 | + /// # |
| 18 | + /// # fn main() { |
| 19 | + /// # #[cfg(feature = "serde_json")] |
| 20 | + /// # run_test().unwrap(); |
| 21 | + /// # } |
| 22 | + /// # |
| 23 | + /// # #[cfg(feature = "serde_json")] |
| 24 | + /// # fn run_test() -> QueryResult<()> { |
| 25 | + /// # use diesel::dsl::json; |
| 26 | + /// # use serde_json::{json, Value}; |
| 27 | + /// # use diesel::sql_types::{Text, Nullable}; |
| 28 | + /// # let connection = &mut establish_connection(); |
| 29 | + /// |
| 30 | + /// let result = diesel::select(json::<Text, _>(r#"{"a": "b", "c": 1}"#)) |
| 31 | + /// .get_result::<Value>(connection)?; |
| 32 | + /// |
| 33 | + /// assert_eq!(json!({"a":"b","c":1}), result); |
| 34 | + /// |
| 35 | + /// let result = diesel::select(json::<Text, _>(r#"{ "this" : "is", "a": [ "test" ] }"#)) |
| 36 | + /// .get_result::<Value>(connection)?; |
| 37 | + /// |
| 38 | + /// assert_eq!(json!({"a":["test"],"this":"is"}), result); |
| 39 | + /// |
| 40 | + /// let result = diesel::select(json::<Nullable<Text>, _>(None::<&str>)) |
| 41 | + /// .get_result::<Option<Value>>(connection)?; |
| 42 | + /// |
| 43 | + /// assert!(result.is_none()); |
| 44 | + /// |
| 45 | + /// # Ok(()) |
| 46 | + /// # } |
| 47 | + /// ``` |
| 48 | + fn json<E: TextOrNullableText + MaybeNullableValue<Json>>(e: E) -> E::Out; |
| 49 | +} |
| 50 | + |
| 51 | +#[cfg(feature = "sqlite")] |
| 52 | +define_sql_function! { |
| 53 | + /// The jsonb(X) function returns the binary JSONB representation of the JSON provided as argument X. |
| 54 | + /// |
| 55 | + /// # Example |
| 56 | + /// |
| 57 | + /// ```rust |
| 58 | + /// # include!("../../doctest_setup.rs"); |
| 59 | + /// # |
| 60 | + /// # fn main() { |
| 61 | + /// # #[cfg(feature = "serde_json")] |
| 62 | + /// # run_test().unwrap(); |
| 63 | + /// # } |
| 64 | + /// # |
| 65 | + /// # #[cfg(feature = "serde_json")] |
| 66 | + /// # fn run_test() -> QueryResult<()> { |
| 67 | + /// # use diesel::dsl::{sql, jsonb}; |
| 68 | + /// # use serde_json::{json, Value}; |
| 69 | + /// # use diesel::sql_types::{Text, Binary, Nullable}; |
| 70 | + /// # let connection = &mut establish_connection(); |
| 71 | + /// |
| 72 | + /// let version = diesel::select(sql::<Text>("sqlite_version();")) |
| 73 | + /// .get_result::<String>(connection)?; |
| 74 | + /// |
| 75 | + /// // Querying SQLite version should not fail. |
| 76 | + /// let version_components: Vec<&str> = version.split('.').collect(); |
| 77 | + /// let major: u32 = version_components[0].parse().unwrap(); |
| 78 | + /// let minor: u32 = version_components[1].parse().unwrap(); |
| 79 | + /// let patch: u32 = version_components[2].parse().unwrap(); |
| 80 | + /// |
| 81 | + /// if major > 3 || (major == 3 && minor >= 45) { |
| 82 | + /// /* Valid sqlite version, do nothing */ |
| 83 | + /// } else { |
| 84 | + /// println!("SQLite version is too old, skipping the test."); |
| 85 | + /// return Ok(()); |
| 86 | + /// } |
| 87 | + /// |
| 88 | + /// let result = diesel::select(jsonb::<Binary, _>(br#"{"a": "b", "c": 1}"#)) |
| 89 | + /// .get_result::<Value>(connection)?; |
| 90 | + /// |
| 91 | + /// assert_eq!(json!({"a": "b", "c": 1}), result); |
| 92 | + /// |
| 93 | + /// let result = diesel::select(jsonb::<Binary, _>(br#"{"this":"is","a":["test"]}"#)) |
| 94 | + /// .get_result::<Value>(connection)?; |
| 95 | + /// |
| 96 | + /// assert_eq!(json!({"this":"is","a":["test"]}), result); |
| 97 | + /// |
| 98 | + /// let result = diesel::select(jsonb::<Nullable<Binary>, _>(None::<Vec<u8>>)) |
| 99 | + /// .get_result::<Option<Value>>(connection)?; |
| 100 | + /// |
| 101 | + /// assert!(result.is_none()); |
| 102 | + /// |
| 103 | + /// # Ok(()) |
| 104 | + /// # } |
| 105 | + /// ``` |
| 106 | + fn jsonb<E: BinaryOrNullableBinary + MaybeNullableValue<Jsonb>>(e: E) -> E::Out; |
| 107 | +} |
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