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65 lines
2.2 KiB
65 lines
2.2 KiB
// Copyright (c) 2012-present The upper.io/db authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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package db
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import (
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"github.com/upper/db/v4/internal/adapter"
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)
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// OrExpr represents a logical expression joined by logical disjunction (OR).
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type OrExpr struct {
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*adapter.LogicalExprGroup
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}
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// Or adds more expressions to the group.
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func (o *OrExpr) Or(orConds ...LogicalExpr) *OrExpr {
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var fn func(*[]LogicalExpr) error
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if len(orConds) > 0 {
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fn = func(in *[]LogicalExpr) error {
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*in = append(*in, orConds...)
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return nil
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}
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}
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return &OrExpr{o.LogicalExprGroup.Frame(fn)}
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}
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// Empty returns false if the expressions has zero conditions.
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func (o *OrExpr) Empty() bool {
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return o.LogicalExprGroup.Empty()
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}
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// Or joins conditions under logical disjunction. Conditions can be represented
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// by `db.Cond{}`, `db.Or()` or `db.And()`.
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//
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// Example:
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//
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// // year = 2012 OR year = 1987
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// db.Or(
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// db.Cond{"year": 2012},
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// db.Cond{"year": 1987},
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// )
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func Or(conds ...LogicalExpr) *OrExpr {
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return &OrExpr{adapter.NewLogicalExprGroup(adapter.LogicalOperatorOr, defaultJoin(conds...)...)}
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}
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var _ = adapter.LogicalExpr(&OrExpr{})
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