Packages

  • package root

    Documentation/API for the Molecule library - a meta DSL for the Datomic database.

    Manual | scalamolecule.org | Github | Forum

    Definition Classes
    root
  • package molecule

    Molecule library - a Scala meta-DSL for the Datomic database.

    Molecule library - a Scala meta-DSL for the Datomic database.

    See api package for various api imports to start using Molecule.

    Sub-packages

    api Molecule API.
    ast Internal Molecule ASTs.
    boilerplate Internal interfaces for auto-generated DSL boilerplate code.
    composition    Builder methods to compose molecules.
    exceptions Exceptions thrown by Molecule.
    expression Attribute expressions and operations.
    facade Molecule facades to Datomic.
    factory Implicit macro methods `m` to instantiate molecules from custom DSL molecule constructs.
    input Input molecules awaiting input.
    macros Internal macros generating molecule code from custom DSL molecule constructs.
    generic Interfaces to generic information about datoms and Datomic database.
    ops Internal operational helpers for transforming DSL to molecule.
    schema Schema definition DSL.
    transform Internal transformers from DSL to Model/Query/Transaction.
    util Internal Java database functions for Datomic.

    Definition Classes
    root
  • package api
    Definition Classes
    molecule
  • package get

    Synchronous getter methods to retrieve data from Datomic.

    Synchronous getter methods to retrieve data from Datomic.

    The Datomic On-Prem(ises) server model provides a Peer that returns data synchronously. The Peer which lives in application memory caches data aggressively and for data fitting in memory latency can be extremely low and queries return very fast. And even when access to disk is needed, clever branching is used. Memcached is also an option.

    The Datomic Cloud model data returns data asynchronously. If Datomic creates a Java API for the Cloud model, Molecule could relatively easy adapt to this model too. In the meanwhile, Future-wrapped methods in this package can be used.

    Molecule has 5 groups of synchronous getters, each returning data in various formats:

    • GetArray - fastest retrieved typed data set. Can be traversed with a fast while loop
    • GetIterable - for lazily traversing row by row
    • GetJson - data formatted as Json string
    • GetList - default getter returning Lists of tuples. Convenient typed data, suitable for smaller data sets
    • GetRaw - fastest retrieved raw un-typed data from Datomic

    Getters in each of the 5 groups come with 5 time-dependent variations:

    • get [current data]
    • getAsOf
    • getSince
    • getWith
    • getHistory

    Each time variation has various overloads taking different parameters (see each group for more info).

    Definition Classes
    api
    See also

    equivalent asynchronous getters in the getAsync package.

  • GetArray
  • GetIterable
  • GetJson
  • GetList
  • GetRaw

trait GetJson extends AnyRef

Data getter methods on molecules that return a Json String.

Molecule builds a Json String directly from the untyped raw Datomic data.

Attributes names are used as Json field names. In order to distinguish fields from each other, all attribute names are prepended with the namespace name (in lowercase). For a namespace Person with an attribute name we get:

  • "person.name"

To distinguis fields of multiple relationships to the same namespace like friends and enemies pointing to other Person's require us to add a relationship name prefix too:

  • "friends.person.name"
  • "enemies.person.name"

Furthermore, if the attribute is part of a transaction meta-data molecule, we prefix that with tx too:

  • "tx.person.name"
  • "tx.friends.person.name"
Self Type
GetJson with MoleculeBase with JsonBuilder
Source
GetJson.scala
See also

Json tests

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    @native()
  10. def getJson(n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule

    Get json data for n rows matching molecule

    Person.name.age.getJson(1) ===
      """[
        |{"person.name": "Ben", "person.age": 42}
        |]""".stripMargin

    Namespace.Attribute is used as json fields. Values are quoted when necessary. Nested data becomes json objects etc.

    n

    Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on getJson

    Equivalent asynchronous getAsyncJson method.

  11. def getJson(implicit conn: Conn): String

    Get json data for all rows matching molecule.

    Get json data for all rows matching molecule.

    Person.name.age.getJson ===
      """[
        |{"person.name": "Ben", "person.age": 42},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin

    Namespace.Attribute is used as json fields. Values are quoted when necessary. Nested data becomes json objects etc.

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on getJson

    Equivalent asynchronous getAsyncJson method.

  12. def getJsonAsOf(date: Date, n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule as of tx.

    Get json data for n rows matching molecule as of tx.

    Get data at a human point in time (a java.util.Date).

    val beforeInsert = new java.util.Date
    
    // Insert
    val tx1 = Person.name.age insert List(
      ("Ben", 42),
      ("Liz", 37)
    )
    val List(ben, liz) = tx1.eids
    val afterInsert = new java.util.Date
    
    // Update
    val tx2 = Person(ben).age(43).update
    val afterUpdate = new java.util.Date
    
    // Get List of all rows as of afterUpdate
    Person.name.age.getJsonAsOf(afterUpdate) ===
      """[
        |{"person.name": "Ben", "person.age": 43},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get List of n rows as of afterUpdate
    Person.name.age.getJsonAsOf(afterUpdate, 1) ===
      """[
        |{"person.name": "Ben", "person.age": 43}
        |]""".stripMargin
    date

    java.util.Date

    n

    Int Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonAsOf method.

  13. def getJsonAsOf(date: Date)(implicit conn: Conn): String

    Get json data for all rows matching molecule as of date.

    Get json data for all rows matching molecule as of date.

    Get data at a human point in time (a java.util.Date).

    val beforeInsert = new java.util.Date
    
    // Insert
    val tx1 = Person.name.age insert List(
      ("Ben", 42),
      ("Liz", 37),
    )
    val List(ben, liz) = tx1.eids
    val afterInsert = new java.util.Date
    
    // Update
    val tx2 = Person(ben).age(43).update
    val afterUpdate = new java.util.Date
    
    // Retract
    val tx3 = ben.retract
    val afterRetract = new java.util.Date
    
    // No data yet before insert
    Person.name.age.getJsonAsOf(beforeInsert) === ""
    
    // Get List of all rows as of afterInsert
    Person.name.age.getJsonAsOf(afterInsert) ===
      """[
        |{"person.name": "Ben", "person.age": 42},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get List of all rows as of afterUpdate
    Person.name.age.getJsonAsOf(afterUpdate) ===
      """[
        |{"person.name": "Ben", "person.age": 43},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get List of all rows as of afterRetract
    Person.name.age.getJsonAsOf(afterRetract) ===
      """[
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    date

    java.util.Date

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonAsOf method.

  14. def getJsonAsOf(tx: TxReport, n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule as of tx.

    Get json data for n rows matching molecule as of tx.

    Datomic's internal asOf method can take a transaction entity id as argument to retrieve a database value as of that transaction (including).

    Instead of supplying the transaction entity id, in Molecule we supply a TxReport that contains the transaction entity id (which is used as argument to Datomic internally). This is more convenient when using Molecule since we get a TxReport from transaction operations like get, update, retract etc.

    // Insert (tx report 1)
    val tx1 = Person.name.age insert List(
      ("Ben", 42),
      ("Liz", 37)
    )
    val List(ben, liz) = tx1.eids
    
    // Update (tx report 2)
    val tx2 = Person(ben).age(43).update
    
    // Get json for all rows as of transaction tx2 (after update) - Ben now 43
    Person.name.age.getJsonAsOf(tx2) ===
      """[
        |{"person.name": "Ben", "person.age": 43},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get json for n rows as of transaction tx2 (after update) - Ben now 43
    Person.name.age.getJsonAsOf(tx2, 1) ===
      """[
        |{"person.name": "Ben", "person.age": 43}
        |]""".stripMargin
    tx

    TxReport (returned from all molecule transaction operations)

    n

    Int Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonAsOf method.

  15. def getJsonAsOf(tx: TxReport)(implicit conn: Conn): String

    Get json data for all rows matching molecule as of tx.

    Get json data for all rows matching molecule as of tx.

    Datomic's internal asOf method can take a transaction entity id as argument to retrieve a database value as of that transaction (including).

    Instead of supplying the transaction entity id, in Molecule we supply a TxReport that contains the transaction entity id (which is used as argument to Datomic internally). This is more convenient when using Molecule since we get a TxReport from transaction operations like get, update, retract etc.

    // Insert (tx report 1)
    val tx1 = Person.name.age insert List(
      ("Ben", 42),
      ("Liz", 37)
    )
    val List(ben, liz) = tx1.eids
    
    // Update (tx report 2)
    val tx2 = Person(ben).age(43).update
    
    // Retract (tx report 3)
    val tx3 = ben.retract
    
    // Get json for all rows as of transaction tx1 (after insert)
    Person.name.age.getJsonAsOf(tx1) ===
      """[
        |{"person.name": "Ben", "person.age": 42},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get json for all rows as of transaction tx2 (after update) - Ben now 43
    Person.name.age.getJsonAsOf(tx2) ===
      """[
        |{"person.name": "Ben", "person.age": 43},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get json for all rows as of transaction tx3 (after retract) - Ben gone
    Person.name.age.getJsonAsOf(tx3) ===
      """[
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    tx

    TxReport (returned from all molecule transaction operations)

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonAsOf method.

  16. def getJsonAsOf(t: Long, n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule as of transaction time t.

    Get json data for n rows matching molecule as of transaction time t.

    Transaction time t is an auto-incremented transaction number assigned internally by Datomic.

    t can for instance be retrieved in a getHistory call for an attribute and then be used to get data as of that point in time (including that transaction):

    // Insert (t 1028)
    val List(ben, liz) = Person.name.age insert List(
      ("Ben", 42),
      ("Liz", 37)
    ) eids
    
    // Update (t 1031)
    Person(ben).age(43).update
    
    // History of Ben
    Person(ben).age.t.op.getHistory.sortBy(r => (r._2, r._3)) === List(
      (42, 1028, true),  // Insert:  42 asserted
      (42, 1031, false), // Update:  42 retracted
      (43, 1031, true),  //          43 asserted
    )
    
    // Get json for all rows as of transaction t 1031 (after update)
    Person.name.age.getJsonAsOf(1031) ===
      """[
        |{"person.name": "Ben", "person.age": 43},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get json for n (1) rows as of transaction t 1031 (after update)
    Person.name.age.getJsonAsOf(1031, 1) ===
      """[
        |{"person.name": "Ben", "person.age": 43}
        |]""".stripMargin
    t

    Transaction time t

    n

    Int Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonAsOf method.

  17. def getJsonAsOf(t: Long)(implicit conn: Conn): String

    Get json data for all rows matching molecule as of transaction time t.

    Get json data for all rows matching molecule as of transaction time t.

    Transaction time t is an auto-incremented transaction number assigned internally by Datomic.

    t can for instance be retrieved in a getHistory call for an attribute and then be used to get data as of that point in time (including that transaction):

    // Insert (t 1028)
    val List(ben, liz) = Person.name.age insert List(
      ("Ben", 42),
      ("Liz", 37)
    ) eids
    
    // Update (t 1031)
    Person(ben).age(43).update
    
    // Retract (t 1032)
    ben.retract
    
    // History of Ben
    Person(ben).age.t.op.getHistory.sortBy(r => (r._2, r._3)) === List(
      (42, 1028, true),  // Insert:  42 asserted
      (42, 1031, false), // Update:  42 retracted
      (43, 1031, true),  //          43 asserted
      (43, 1032, false)  // Retract: 43 retracted
    )
    
    // Get json for all rows as of transaction t 1028 (after insert)
    Person.name.age.getJsonAsOf(1028) ===
      """[
        |{"person.name": "Ben", "person.age": 42},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get json for all rows as of transaction t 1031 (after update) - Ben now 43
    Person.name.age.getJsonAsOf(1031) ===
      """[
        |{"person.name": "Ben", "person.age": 43},
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    
    // Get json for all rows as of transaction t 1032 (after retract) - Ben gone
    Person.name.age.getJsonAsOf(1032) ===
      """[
        |{"person.name": "Liz", "person.age": 37}
        |]""".stripMargin
    t

    Transaction time t

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonAsOf method.

  18. def getJsonComposite(conn: Conn, n: Int): String
    Attributes
    protected
  19. def getJsonFlat(conn: Conn, n: Int): String
    Attributes
    protected
  20. def getJsonSince(date: Date, n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule since date.

    Get json data for n rows matching molecule since date.

    Get data added/retracted since a human point in time (a java.util.Date).

    // Transact 3 times (`inst` retrieves transaction time/Date from tx report)
    val date1 = Person.name("Ann").save.inst
    val date2 = Person.name("Ben").save.inst
    val date3 = Person.name("Cay").save.inst
    
    // Current values
    Person.name.get === List("Ann", "Ben", "Cay")
    
    // Ben and Cay added since date1
    Person.name.getJsonSince(date1) ===
      """[
        |{"person.name": "Ben"},
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Ben and Cay added since date1 - only n (1) rows returned
    Person.name.getJsonSince(date1, 1) ===
      """[
        |{"person.name": "Ben"}
        |]""".stripMargin
    date

    java.util.Date

    n

    Int Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonSince method.

  21. def getJsonSince(date: Date)(implicit conn: Conn): String

    Get json data for all rows matching molecule since date.

    Get json data for all rows matching molecule since date.

    Get data added/retracted since a human point in time (a java.util.Date).

    // Transact 3 times (`inst` retrieves transaction time/Date from tx report)
    val date1 = Person.name("Ann").save.inst
    val date2 = Person.name("Ben").save.inst
    val date3 = Person.name("Cay").save.inst
    
    // Current values
    Person.name.get === List("Ann", "Ben", "Cay")
    
    // Ben and Cay added since date1
    Person.name.getJsonSince(date1) ===
      """[
        |{"person.name": "Ben"},
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Cay added since date2
    Person.name.getJsonSince(date2) ===
      """[
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Nothing added since date3
    Person.name.getJsonSince(date3) === ""
    date

    java.util.Date

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonSince method.

  22. def getJsonSince(tx: TxReport, n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule since tx.

    Get json data for n rows matching molecule since tx.

    Datomic's internal since can take a transaction entity id as argument to retrieve a database value since that transaction (excluding the transaction itself).

    Instead of supplying the transaction entity id, in Molecule we supply a TxReport that contains the transaction entity id (which is used as argument to Datomic internally). This is more convenient when using Molecule since we getAsync a TxReport from transaction operations like get, update, retract etc.

    // Get tx reports for 3 transactions
    val tx1 = Person.name("Ann").save
    val tx2 = Person.name("Ben").save
    val tx3 = Person.name("Cay").save
    
    // Current values
    Person.name.get === List("Ann", "Ben", "Cay")
    
    // Ben and Cay added since tx1
    Person.name.getJsonSince(tx1) ===
      """[
        |{"person.name": "Ben"},
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Ben and Cay added since tx1 - only n (1) rows returned
    Person.name.getJsonSince(tx1, 1) ===
      """[
        |{"person.name": "Ben"}
        |]""".stripMargin
    tx

    TxReport (returned from all molecule transaction operations)

    n

    Int Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonSince method.

  23. def getJsonSince(tx: TxReport)(implicit conn: Conn): String

    Get json data for all rows matching molecule since tx.

    Get json data for all rows matching molecule since tx.

    Datomic's internal since can take a transaction entity id as argument to retrieve a database value since that transaction (excluding the transaction itself).

    Instead of supplying the transaction entity id, in Molecule we supply a TxReport that contains the transaction entity id (which is used as argument to Datomic internally). This is more convenient when using Molecule since we getAsync a TxReport from transaction operations like get, update, retract etc.

    // Get tx reports for 3 transactions
    val tx1 = Person.name("Ann").save
    val tx2 = Person.name("Ben").save
    val tx3 = Person.name("Cay").save
    
    // Current values
    Person.name.get === List("Ann", "Ben", "Cay")
    
    // Ben and Cay added since tx1
    Person.name.getJsonSince(tx1) ===
      """[
        |{"person.name": "Ben"},
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Cay added since tx2
    Person.name.getJsonSince(tx2) ===
      """[
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Nothing added since tx3
    Person.name.getJsonSince(tx3) === ""
    tx

    TxReport (returned from all molecule transaction operations)

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonSince method.

  24. def getJsonSince(t: Long, n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule since transaction time t.

    Get json data for n rows matching molecule since transaction time t.

    Transaction time t is an auto-incremented transaction number assigned internally by Datomic.

    t can for instance be retrieved by calling t on the tx report returned from transactional operations and then be used to get data since that point in time (excluding that transaction):

    // 3 transaction times `t`
    val t1 = Person.name("Ann").save.t
    val t2 = Person.name("Ben").save.t
    val t3 = Person.name("Cay").save.t
    
    // Current values
    Person.name.get === List("Ann", "Ben", "Cay")
    
    // Ben and Cay added since transaction time t 1028
    Person.name.getJsonSince(t1) ===
      """[
        |{"person.name": "Ben"},
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Ben and Cay added since transaction time t 1028 - only n (1) rows returned
    Person.name.getJsonSince(t1, 1) ===
      """[
        |{"person.name": "Ben"}
        |]""".stripMargin
    t

    Transaction time t

    n

    Int Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonSince method.

  25. def getJsonSince(t: Long)(implicit conn: Conn): String

    Get json data for all rows matching molecule since transaction time t.

    Get json data for all rows matching molecule since transaction time t.

    Transaction time t is an auto-incremented transaction number assigned internally by Datomic.

    t can for instance be retrieved by calling t on the tx report returned from transactional operations and then be used to get data since that point in time (excluding that transaction):

    // 3 transaction times `t`
    val t1 = Person.name("Ann").save.t
    val t2 = Person.name("Ben").save.t
    val t3 = Person.name("Cay").save.t
    
    // Current values
    Person.name.get === List("Ann", "Ben", "Cay")
    
    // Ben and Cay added since transaction time t 1028
    Person.name.getJsonSince(t1) ===
      """[
        |{"person.name": "Ben"},
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Cay added since transaction time t 1030
    Person.name.getJsonSince(t2) ===
      """[
        |{"person.name": "Cay"}
        |]""".stripMargin
    
    // Nothing added since transaction time t 1032
    Person.name.getJsonSince(t3) === ""
    t

    Transaction time t

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on asof/since

    Equivalent asynchronous getAsyncJsonSince method.

  26. def getJsonWith(txData: List[_], n: Int)(implicit conn: Conn): String

    Get json data for n rows matching molecule with applied raw transaction data.

    Get json data for n rows matching molecule with applied raw transaction data.

    Apply raw transaction data to in-memory "branch" of db without affecting db to see how it would then look:

    // Live size of Person db
    Person.name.get.size === 150
    
    // Read some transaction data from file
    val data_rdr2 = new FileReader("examples/resources/seattle/seattle-data1a.dtm")
    val newDataTx = Util.readAll(data_rdr2).get(0).asInstanceOf[java.util.List[Object]]
    
    // Imagine future db - 100 persons would be added, apparently
    Person.name.getJsonWith(newDataTx).size === 250
    
    // Imagine future db - Let's just take 10
    Person.name.getJsonWith(newDataTx, 10).size === 10
    txData

    Raw transaction data as java.util.List[Object]

    n

    Int Number of rows returned

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on with

    Equivalent asynchronous getAsyncJsonWith method.

  27. def getJsonWith(txData: List[_])(implicit conn: Conn): String

    Get json data for all rows matching molecule with applied raw transaction data.

    Get json data for all rows matching molecule with applied raw transaction data.

    Apply raw transaction data to in-memory "branch" of db without affecting db to see how it would then look:

    // Live size of Person db
    Person.name.get.size === 150
    
    // Read some transaction data from file
    val data_rdr2 = new FileReader("examples/resources/seattle/seattle-data1a.dtm")
    val newDataTx = Util.readAll(data_rdr2).get(0).asInstanceOf[java.util.List[Object]]
    
    // Imagine future db - 100 persons would be added, apparently
    Person.name.getJsonWith(newDataTx).size === 250
    txData

    Raw transaction data as java.util.List[Object]

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on with

    Equivalent asynchronous getAsyncJsonWith method.

  28. def getJsonWith(n: Int, txMolecules: Seq[Seq[Statement]]*)(implicit conn: Conn): String

    Get json data for all rows matching molecule with applied molecule transaction data.

    Get json data for all rows matching molecule with applied molecule transaction data.

    Apply one or more molecule transactions to in-memory "branch" of db without affecting db to see how it would then look:

    // Current state
    val List(ben, liz) = Person.name.likes.insert(
      ("Ben", "pasta"),
      ("Liz", "pizza")
    ).eids
    
    // Test multiple transactions
    Person.name.likes.getJsonWith(
      Person(ben).likes("sushi").getUpdateTx,
      Person(liz).likes("cake").getUpdateTx
    ) ===
      """[
        |{"person.name": "Ben", "person.likes": "sushi"},
        |{"person.name": "Liz", "person.likes": "cake"}
        |]""".stripMargin
    
    // Same as above, but only n (1) rows returned:
    Person.name.likes.getJsonWith(
      1
      Person(ben).likes("sushi").getUpdateTx,
      Person(liz).likes("cake").getUpdateTx
    ) ===
      """[
        |{"person.name": "Ben", "person.likes": "sushi"}
        |]""".stripMargin

    Multiple transactions can be applied to test more complex what-if scenarios!

    txMolecules

    Transaction statements from applied Molecules with test data

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on with

    Equivalent asynchronous getAsyncJsonWith method.

  29. def getJsonWith(txMolecules: Seq[Seq[Statement]]*)(implicit conn: Conn): String

    Get json data for all rows matching molecule with applied molecule transaction data.

    Get json data for all rows matching molecule with applied molecule transaction data.

    Apply one or more molecule transactions to in-memory "branch" of db without affecting db to see how it would then look:

    // Current state
    val ben = Person.name("Ben").likes("pasta").save.eid
    
    // Base data
    Person.name.likes.getJsonWith(
      // apply imaginary transaction data
      Person(ben).likes("sushi").getUpdateTx
    ) ===
      """[
        |{"person.name": "Ben", "person.likes": "sushi"}
        |]""".stripMargin
    
    // Current state is still the same
    Person.name.likes.get === List(("Ben", "pasta"))

    Multiple transactions can be applied to test more complex what-if scenarios!

    txMolecules

    Transaction statements from applied Molecules with test data

    conn

    Implicit Conn value in scope

    returns

    String of json

    See also

    Manual on with

    Equivalent asynchronous getAsyncJsonWith method.

  30. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  31. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  32. final def ne(arg0: AnyRef): Boolean
    Definition Classes
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  33. final def notify(): Unit
    Definition Classes
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    @native()
  34. final def notifyAll(): Unit
    Definition Classes
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    @native()
  35. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
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  36. def toString(): String
    Definition Classes
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  37. final def wait(): Unit
    Definition Classes
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    @throws(classOf[java.lang.InterruptedException])
  38. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
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    @throws(classOf[java.lang.InterruptedException])
  39. final def wait(arg0: Long): Unit
    Definition Classes
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    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from AnyRef

Inherited from Any

get

getJsonAsOf

getJsonSince

getJsonWith

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