mirror of https://github.com/go-gorm/gorm.git
78 lines
1.5 KiB
Go
78 lines
1.5 KiB
Go
package clause
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// Where where clause
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type Where struct {
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AndConditions AddConditions
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ORConditions []ORConditions
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builders []Expression
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}
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// Name where clause name
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func (where Where) Name() string {
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return "WHERE"
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}
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// Build build where clause
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func (where Where) Build(builder Builder) {
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var withConditions bool
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if len(where.AndConditions) > 0 {
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withConditions = true
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where.AndConditions.Build(builder)
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}
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if len(where.builders) > 0 {
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for _, b := range where.builders {
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if withConditions {
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builder.Write(" AND ")
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}
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withConditions = true
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b.Build(builder)
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}
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}
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var singleOrConditions []ORConditions
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for _, or := range where.ORConditions {
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if len(or) == 1 {
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if withConditions {
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builder.Write(" OR ")
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or.Build(builder)
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} else {
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singleOrConditions = append(singleOrConditions, or)
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}
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} else {
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withConditions = true
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builder.Write(" AND (")
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or.Build(builder)
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builder.WriteByte(')')
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}
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}
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for _, or := range singleOrConditions {
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if withConditions {
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builder.Write(" AND ")
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or.Build(builder)
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} else {
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withConditions = true
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or.Build(builder)
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}
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}
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if !withConditions {
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builder.Write(" FALSE")
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}
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return
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}
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// MergeExpression merge where clauses
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func (where Where) MergeExpression(expr Expression) {
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if w, ok := expr.(Where); ok {
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where.AndConditions = append(where.AndConditions, w.AndConditions...)
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where.ORConditions = append(where.ORConditions, w.ORConditions...)
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where.builders = append(where.builders, w.builders...)
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} else {
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where.builders = append(where.builders, expr)
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}
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}
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